List of the Paleozoic life of Oklahoma

This list of the Paleozoic life of Oklahoma contains the various prehistoric life-forms whose fossilized remains have been reported from within the US state of Oklahoma and are between 541 and 252.17 million years of age.

A

• †Abludoglyptocrinus
• †Abyssocrinus
  • †Abyssocrinus antiquus
• †Abyssomedon – type locality for genus
  • †Abyssomedon williamsi – type locality for species
• †Acanthobolbina
  • †Acanthobolbina loeblichi
• †Acanthocladia
  • †Acanthocladia ouachitensis
• †Acanthocrania
  • †Acanthocrania erecta
  • †Acanthocrania oklahomensis
  • †Acanthocrania subquadrata
• †Acanthopecten
  • †Acanthopecten grandis – type locality for species
• †Acanthospirina
• †Acanthotriletes
• †Acheloma
  • †Acheloma cumminsi – or unidentified comparable form
  • †Acheloma dunni – type locality for species
• †Acidiphorus
  • †Acidiphorus williamsi – or unidentified comparable form

• 

  Illustration of a fossilized skull in multiple views of the Permian primitive reptile Acleistorhinus

  †Acleistorhinus – type locality for genus
  • †Acleistorhinus pteroticus – type locality for species
• †Acolocrinus
  • †Acolocrinus crinerensis
• †Actinotodissus
  • †Actinotodissus longitaleosus
• †Adairia
  • †Adairia adairensis – type locality for species
• †Adornofusa
  • †Adornofusa microhapsis
• †Aechmina
  • †Aechmina geneae
  • †Aechmina longispina
  • †Aechmina truncata – tentative report
• †Aechminaria
  • †Aechminaria ambigua
  • †Aechminaria longispina
  • †Aechminaria truncata – tentative report
• †Aechminella
  • †Aechminella buchanani – type locality for species
  • †Aechminella trispinosa – type locality for species
• †Affinocrinus
  • †Affinocrinus grandis – type locality for species
  • †Affinocrinus normalis
  • †Affinocrinus orbis – type locality for species
  • †Affinocrinus politus – type locality for species
  • †Affinocrinus progressus – type locality for species
• †Alatisporites
  • †Alatisporites pustulatus
• †Albertoceras
  • †Albertoceras minimum
• †Alcimocrinus
  • †Alcimocrinus girtyi

• 

  Fossilized fronds of the Carboniferous-Early Cretaceous seed fern Alethopteris

  †Alethopteris
  • †Alethopteris ambigua
  • †Alethopteris lesquereuxii
  • †Alethopteris serlii
  • †Alethopteris sullivantii
• †Alexandrinia
  • †Alexandrinia directa – type locality for species
• †Alisporites
  • †Alisporites aequus – type locality for species
  • †Alisporites zapfei
• †Allocrinus
  • †Allocrinus divergens
  • †Allocrinus globulus
  • †Allocrinus irroratus
• †Alloiopteris
• †Allorisma
  • †Allorisma albequus
  • †Allorisma maynardwhitei – type locality for species
  • †Allorisma snideri – type locality for species
• †Allotropiophyllum – or unidentified comparable form
• †Amarixys
  • †Amarixys gracilis
• †Amaurotoma – tentative report
  • †Amaurotoma knighti – type locality for species
• †Ameura
  • †Ameura major
• Ammobaculites
• Ammodiscus
• †Ammovertella
  • †Ammovertella inversa
• †Ampelocrinus
  • †Ampelocrinus convexus
• †Amphilichas
  • †Amphilichas subpunctatus
• †Amphipsalidocrinus
• †Amphiscapha
  • †Amphiscapha catilloides
• †Amphisella
• †Amphissites
  • †Amphissites bradfieldi – type locality for species
  • †Amphissites bushi – type locality for species
  • †Amphissites marginiferus
  • †Amphissites miseri – type locality for species
  • †Amphissites nodosus
  • †Amphissites rugosus
  • †Amphissites wapanuckensis
• †Amphistrophia
  • †Amphistrophia prolongata
• †Amsdenina
• †Amsdenoides
• †Amygdalocystites
  • †Amygdalocystites florealis
  • †Amygdalocystites tribrachiatus
• †Anabathra
  • †Anabathra pulcherrima
• †Anachoropteris
  • †Anachoropteris gillotii
  • †Anachoropteris involuta
• †Anachroropteris
  • †Anachroropteris involuta
• †Ananaspis
  • †Ananaspis guttulus
• †Anapiculatasporites
  • †Anapiculatasporites spinosus
• †Anapiculatisporites
  • †Anapiculatisporites edgarensis
  • †Anapiculatisporites spinosus
• †Anaplanisporites
• †Anasobella
• †Anastrophia
  • †Anastrophia delicata
  • †Anastrophia grossa – type locality for species
• †Anataphrus
  • †Anataphrus kermiti – type locality for species
• †Anatiferocystis
  • †Anatiferocystis papillata
• †Anchicrinus
  • †Anchicrinus echinosacculus – type locality for species
  • †Anchicrinus planulatus – type locality for species
  • †Anchicrinus rugosus
• †Ancistrorhyncha
  • †Ancistrorhyncha costata
  • †Ancistrorhyncha globularis
• †Ancoradella
  • †Ancoradella ploeckensis
• †Anematina
• †Angelosaurus
  • †Angelosaurus romeri – type locality for species
• †Anguisporites
  • †Anguisporites contortus – type locality for species
  • †Anguisporites intonsus – type locality for species
• † Anisophyllum

• 

  Fossil of the Carboniferous horsetail relative Annularia

  †Annularia
  • †Annularia sphenophylloides
  • †Annularia stellata
• †Anobasicrinus
  • †Anobasicrinus obscurus
• †Anolotichia
  • †Anolotichia deckeri
  • †Anolotichia impolita
  • †Anolotichia spinulifera
• †Anomalogramma
  • †Anomalogramma parva
• †Anomalohymen – type locality for genus
  • †Anomalohymen dochmus – type locality for species
• †Anomalorthis
  • †Anomalorthis oklahomensis
• †Anomphalus
• †Anthracoceras
  • †Anthracoceras oklahomense – type locality for species
• †Anthracocrinus
  • †Anthracocrinus primitivus
• †Anthraconeilo
  • †Anthraconeilo taffiana
• †Anthracospirifer
  • †Anthracospirifer opimus
• †Anthracotarbus – type locality for genus
  • †Anthracotarbus hintoni – type locality for species
• †Anthyrsis
• †Antiquatonia
• †Antirhynchonella
  • †Antirhynchonella thomasi
• †Anulocrinus
  • †Anulocrinus drummuckensis – or unidentified related form
• †Apachella
  • †Apachella capertoni – type locality for species
• †Aparchites
  • †Aparchites maccoyii
  • †Aparchites millepunctatus
  • †Aparchites perforata
• †Aphlebia
• †Apianurus
• †Apiculatasporites
  • †Apiculatasporites latigranifer
  • †Apiculatasporites setulosus
  • †Apiculatasporites spinulistratus
• †Apodasmocrinus
  • †Apodasmocrinus daubei
• †Apographiocrinus
• †Apotocardium
  • †Apotocardium lanterna
  • †Apotocardium plautum
• †Apsidoneura
  • †Apsidoneura flexa
• †Arakespongia – type locality for genus
  • †Arakespongia mega – type locality for species
• †Araucarites
• †Arbucklecystis

• 

  Fossilized shell and spines of the Late Devonian-Permian sea urchin Archaeocidaris

  †Archaeocidaris
  • †Archaeocidaris megastyla
• †Archaeocrinus
  • †Archaeocrinus lacunosus – or unidentified comparable form
  • †Archaeocrinus subglobosus
  • †Archaeocrinus subovalis
• Archaeolithophyllum
• †Archaeophiomusium
  • †Archaeophiomusium burrisi
• †Archaeoscyphia
  • †Archaeoscyphia annulata
• †Archeria
  • †Archeria victori – type locality for species

• 

  Fossils of the Carboniferous-Permian bryozoan Archimedes

  †Archimedes
  • †Archimedes ardmorensis – type locality for species
  • †Archimedes distans
  • †Archimedes meekanoides
  • †Archimedes meekanus – or unidentified comparable form
  • †Archimedes perminimus – or unidentified related form
  • †Archimedes pitkinensis – type locality for species
  • †Archimedes pseudoswallovanus – type locality for species
  • †Archimedes sublaxus – or unidentified comparable form
• †Ardmosteges – type locality for genus
  • †Ardmosteges orchamus – type locality for species
• †Arkacrinus
  • †Arkacrinus constrictus – type locality for species
  • †Arkacrinus dubius
• †Arkanites
  • †Arkanites relictus
• †Arthropora
  • †Arthropora simplex
• †Artinska
  • †Artinska clara
  • †Artinska ovata
• †Asaphocrinus
  • †Asaphocrinus densus
• †Ascograptus
• †Asketopalla
  • †Asketopalla formosula
• †Aspidosaurus – or unidentified comparable form
• †Astartella
  • †Astartella concentrica
  • †Astartella vera
• †Asterophyllites
• †Asthenohymen
  • †Asthenohymen apicalis – type locality for species
  • †Asthenohymen latus – type locality for species
  • †Asthenohymen minutus – type locality for species
  • †Asthenohymen parvulus – type locality for species
  • †Asthenohymen triangularis – type locality for species
• †Astraeospongium
• †Astrocystites
• †Atactoporella
  • †Atactoporella bellula
• †Atelelasma
  • †Atelelasma oklahomense
• †Athlocrinus
  • †Athlocrinus dejustus – type locality for species
• †Athyris
• †Atokacrinus
  • †Atokacrinus tumulosus – type locality for species
• †Atrapocrinus – type locality for genus
  • †Atrapocrinus mutatus – type locality for species
• †Atribonium
  • †Atribonium evexum – or unidentified comparable form

• 

  Fossilized shell of the Late Ordovician-Carboniferous brachiopod Atrypa

  †Atrypa
  • †Atrypa arctostriata
  • †Atrypa oklahomensis
  • †Atrypa tennesseensis
• †Atrypina
  • †Atrypina hami
• †Aulacotheca – or unidentified comparable form
• †Aurimorpha
  • †Aurimorpha varia
• †Auriptygma
• †Austinella
  • †Austinella multicostella

• 

  Mold fossil of a shell of the Early Devonian-Late Triassic bivalve Aviculopecten

  †Aviculopecten
  • †Aviculopecten halensis
  • †Aviculopecten multilineatus
  • †Aviculopecten nodocosta – type locality for species
  • †Aviculopecten tomlinsoni – type locality for species
• †Avonia – tentative report
  • †Avonia snideri – type locality for species
  • †Avonia spinosa – type locality for species
• †Axinolobus

B

• †Bactrites
  • †Bactrites smithianus
• †Bactrocrinites
  • †Bactrocrinites oklahomensis
• †Baeotherates – type locality for genus
  • †Baeotherates fortsillensis – type locality for species
• †Baiosoma
  • †Baiosoma batilia – type locality for species
• Bairdia
  • †Bairdia ardmorensis – type locality for species
  • †Bairdia billjohnsoni – type locality for species
  • †Bairdia croneisi – type locality for species
  • †Bairdia folgeri
  • †Bairdia forakerensis
  • †Bairdia multihilosa – type locality for species
• †Bairdiocypris
• †Bairdocypris – tentative report
  • †Bairdocypris transversus
• †Balticella
  • †Balticella deckeri
  • †Balticella elongata
• †Baltisphaeridium
  • †Baltisphaeridium accinctum
  • †Baltisphaeridium bystrentos
  • †Baltisphaeridium disparicanale
  • †Baltisphaeridium parvigranosum
  • †Baltisphaeridium trophirhapium
• †Barycrinus – tentative report
  • †Barycrinus herculeus – or unidentified related form
• †Bascomella
  • †Bascomella gigantea – or unidentified comparable form
• †Bathysiphon
• †Bathyurellus
  • †Bathyurellus arbucklensis
  • †Bathyurellus inflatus
• †Bathyurus
  • †Bathyurus superbus
• †Batostoma
  • †Batostoma chapparsi
  • †Batostoma chazyensis
  • †Batostoma cumingsi
  • †Batostoma ramosa
  • †Batostoma sheldonensis
  • †Batostoma winchelli
• †Beecheria
• †Beedeina
• †Bellazona
  • †Bellazona bella

• 

  Fossilized shell of the Silurian-Early Triassic mollusc Bellerophon

  †Bellerophon
  • †Bellerophon wewokanus
• †Bellimurina
  • †Bellimurina compressa
  • †Bellimurina subquadrata
• †Belodella
  • †Belodella silurica
• †Benthamaspis
  • †Benthamaspis mediacrista – or unidentified comparable form
  • †Benthamaspis onomeris
  • †Benthamaspis rhochmotis
• †Berestovia
• †Bicornella
  • †Bicornella tricornis
  • †Bicornella unicornis – type locality for species
• †Bigalea
• †Bilinguites
  • †Bilinguites eliasi – type locality for species
• †Bisatoceras – type locality for genus
  • †Bisatoceras primum – type locality for species
• †Bistomiacystis
• †Boesites
  • †Boesites girtyi
• †Bolbocephalus
  • †Bolbocephalus convexus – or unidentified comparable form
  • †Bolbocephalus jeffersonensis
  • †Bolbocephalus myktos
  • †Bolbocephalus stitti
• †Bollia

• 

  Illustration of a fossilized skull of the Permian primitive reptile Bolosaurus

  †Bolosaurus
  • †Bolosaurus grandis – type locality for species
  • †Bolosaurus striatus
• †Bolterpeton – type locality for genus
  • †Bolterpeton carrolli – type locality for species
• †Borestus
  • †Borestus pagoda – type locality for species
• †Bothriocidaris
• †Botryocrinus
  • †Botryocrinus parcus
• †Botryopteris
  • †Botryopteris forensis
  • †Botryopteris mediatena
  • †Botryopteris tridentata
• †Brabeocrinus
  • †Brabeocrinus primus – type locality for species
• †Brachydegma – tentative report
  • †Brachydegma caelatum
• †Brachymimulus
  • †Brachymimulus americanus
• †Brachyprion
  • †Brachyprion arata
  • †Brachyprion attenuata
  • †Brachyprion gibber
  • †Brachyprion gibbera – type locality for species
• †Brachythyris
  • †Brachythyris chouteauensis
• †Bradyina
• †Bransonella – type locality for genus
  • †Bransonella tridentata – type locality for species
• †Breileenia
  • †Breileenia minnewankensis
• †Brevilamnulella
  • †Brevilamnulella thebesensis
• †Bromidechinus – type locality for genus
  • †Bromidechinus rimaporus – type locality for species
• †Bromidella
  • †Bromidella reticulata
• †Bromidocrinus
• †Bromidocystis
• †Buckhornia
  • †Buckhornia carteri
• †Bumastoides
  • †Bumastoides milleri – or unidentified comparable form
• †Buxtonia
  • †Buxtonia incurvatus
  • †Buxtonia semicircularis
  • †Buxtonia suttoni – type locality for species
• Bythocypris
  • †Bythocypris cylindrica
  • †Bythocypris kershavii
  • †Bythocypris spinosa
  • †Bythocypris tomlinsoni
• †Bythopora
  • †Bythopora subgracilis

C

• 

  Life restoration of the Permian amphibian Cacops

  †Cacops
  • †Cacops morrisi – type locality for species
  • †Cacops woehri – type locality for species
• †Cadiospora
  • †Cadiospora magna
• †Caenanoplia
  • †Caenanoplia burlingtonensis
• †Calamaspora
  • †Calamaspora breviradiata – or unidentified comparable form

• 

  Fossilized stems from the Carboniferous-Permian horsetail relative Calamites

  †Calamites
• †Calamospora
  • †Calamospora breviradiata
  • †Calamospora hartungiana
  • †Calamospora liquida
  • †Calamospora mutabilis
  • †Calamospora pedata
  • †Calamospora straminea
• †Calathium
• †Calceocrinus
  • †Calceocrinus humilis
• †Callipteris
• †Callistophyton
  • †Callistophyton boyssetii
• †Calohymen – type locality for genus
  • †Calohymen permianus – type locality for species
• †Calycocrinus
  • †Calycocrinus furnishi – type locality for species
  • †Calycocrinus symmetricus – type locality for species

• 

  Fossil of the Early Ordovician-Early Devonian trilobite Calymene

  †Calymene
  • †Calymene clavicula
• †Calyptaulax
  • †Calyptaulax annulata
• †Camarophorella
• †Camarotoechia
  • †Camarotoechia altisulcata
  • †Camarotoechia carmelensis
  • †Camarotoechia filistriata
  • †Camarotoechia haraganensis
  • †Camarotoechia oklahomensis
• † Camerate
• †Camerella
  • †Camerella anteroplicata
  • †Camerella oklahomensis
• †Camorphoria
• †Campbelloceras
• †Cancelloceras
  • †Cancelloceras huntsvillense – type locality for species
• †Cancrinella
  • †Cancrinella boonensis
• †Caneyella
• †Capnophyllum
• †Captorhinikos
  • †Captorhinikos chozaensis
  • †Captorhinikos parvus – type locality for species
  • †Captorhinikos valensis

• 

  Fossilized skeletons of the Permian reptile Captorhinus

  †Captorhinus
  • †Captorhinus aguti
  • †Captorhinus kierani – type locality for species
  • †Captorhinus laticeps – type locality for species
  • †Captorhinus magnus – type locality for species
• †Carabocrinus
  • †Carabocrinus loeblichi
  • †Carabocrinus logani
  • †Carabocrinus treadwelli
  • †Carabocrinus tumidus
  • †Carabocrinus vancortlandi – or unidentified comparable form
• †Carbonocoryphe
  • †Carbonocoryphe planucauda
• †Carboprimitia
  • †Carboprimitia rotunda – or unidentified comparable form

• 

  Life restoration of the Permian amphibian Cardiocephalus

  †Cardiocephalus
  • †Cardiocephalus peabodyi – type locality for species
  • †Cardiocephalus sternbergi – or unidentified comparable form
• †Cardiodella
  • †Cardiodella abbreviatus
  • †Cardiodella arcuatus
  • †Cardiodella densus
  • †Cardiodella robustus
• †Carolinites
  • †Carolinites sibiricus
• †Caryocaris – tentative report
• †Caryocrinites
• †Cavellina
  • †Cavellina lata
  • †Cavellina subovata
• †Cavernula
  • †Cavernula coccidia
  • †Cavernula pediculata
• †Centrotarphyceras
  • †Centrotarphyceras powersi
• †Ceramopora
  • †Ceramopora unapensis
• †Ceramoporella
  • †Ceramoporella ingenua
• †Ceratiocaris
• †Ceratocephala
  • †Ceratocephala graffhami
• †Ceratonurus
• †Ceratopea
• †Ceraurinella

• 

  Fossil of the Middle-Late Ordovician trilobite Ceraurus

  †Ceraurus
  • †Ceraurus ruidus
• †Cerithioides – tentative report
  • †Cerithioides gleanensis
• †Chaenocardia
  • †Chaenocardia ovata
• †Chaetetes
  • †Chaetetes milleporaceus – or unidentified comparable form
• †Chaloneria
• †Champlainopora
  • †Champlainopora chazyensis
• †Chapmania
  • †Chapmania carterensis
  • †Chapmania oklahomensis
  • †Chapmania taylori
• †Chaulistomella
  • †Chaulistomella crassa
  • †Chaulistomella magna
  • †Chaulistomella mira
  • †Chaulistomella mundula
  • †Chaulistomella nitens
  • †Chaulistomella obesa
• †Cheirocrinus
• †Cheirocystis
  • †Cheirocystis ardmorensis

• 

  Fossil of the Cambrian-Middle Devonian trilobite Cheirurus

  †Cheirurus
  • †Cheirurus infensus
  • †Cheirurus phollikodes – type locality for species
• †Chilotrypa
  • †Chilotrypa distans – type locality for species
• †Chlidochirus
• †Choctawites
  • †Choctawites choctawensis
• †Chonetes
  • †Chonetes decipiens
  • †Chonetes euampygus
  • †Chonetes kingi – type locality for species
  • †Chonetes mesoloba
• †Chonetinella
  • †Chonetinella flemingi – or unidentified comparable form
• †Cibecuia
  • †Cibecuia gouldii
• †Cibolocrinus
  • †Cibolocrinus bellus – type locality for species
  • †Cibolocrinus circulus – type locality for species
  • †Cibolocrinus spinosus – type locality for species
  • †Cibolocrinus tumidus
• †Cirratriradites
  • †Cirratriradites annulatus
  • †Cirratriradites annuliformis
  • †Cirratriradites maculatus
  • †Cirratriradites saturnii

• 

  Fossil of the Carboniferous tabulate coral Cladochonus

  †Cladochonus
• †Claritacarpus – type locality for genus
  • †Claritacarpus smithi – type locality for species
• †Clarkeolepis – type locality for genus
  • †Clarkeolepis clarkei – type locality for species
  • †Clarkeolepis elegans – type locality for species
• †Clathrocrinus
  • †Clathrocrinus grileyi – type locality for species
• †Clavasporites – type locality for genus
  • †Clavasporites irregularis – type locality for species
• †Clavatasporites
  • †Clavatasporites irregularis
• †Cleiocrinus
  • †Cleiocrinus bromidensis – type locality for species
  • †Cleiocrinus regius

• 

  Fossilized shell of the Middle Devonian-Permian brachiopod Cleiothyridina

  †Cleiothyridina
  • †Cleiothyridina glenparkensis – or unidentified comparable form
  • †Cleiothyridina orbicularis
• †Cleithronetrum
  • †Cleithronetrum cancellatum
• †Cleithyridina
  • †Cleithyridina orbicularis
• †Clepsydrops
• †Climacammina
• Cliona
  • †Cliona fenestralis – type locality for species
  • †Cliona paleodendrica – type locality for species
  • †Cliona stellata – type locality for species
• †Clionolithes
  • †Clionolithes radicans – or unidentified comparable form
• †Coelochilina
  • †Coelochilina alata
• †Coelospira
  • †Coelospira concava
  • †Coelospira saffordi
  • †Coelospira virginia
• †Colaptomena
  • †Colaptomena bella
• †Coledium
  • †Coledium simulans

• 

  Illustration of a fossilized cranium of the Permian primitive reptile Colobomycter

  †Colobomycter – type locality for genus
  • †Colobomycter pholeter – type locality for species
  • †Colobomycter vaughni – type locality for species
• †Colpodecrinus
• †Complexisporites
  • †Complexisporites polymorphus
• †Composita
  • †Composita mexicana
  • †Composita rotunda
  • †Composita subcircularis
  • †Composita subtilita
  • †Composita wasatchensis
• Concavisporites
• †Concavissimisporites
• †Condracypris
  • †Condracypris binoda
  • †Condracypris coalensis – type locality for species
  • †Condracypris parallela
  • †Condracypris simplex
• †Condranema
  • †Condranema magna – or unidentified comparable form
• †Conularia
  • †Conularia crustula – or unidentified comparable form
• †Coolinia
  • †Coolinia reedsi
• †Cordania
  • †Cordania falcata
  • †Cordania wessmani
• †Cordylodus
• †Cornigella
  • †Cornigella pushmatahensis – type locality for species
• †Cornulites
  • †Cornulites inelegans
• Cornuspira
  • †Cornuspira semiconstrictus

• 

  Mounted fossilized skeleton of the Permian synapsid (mammal precursor) Cotylorhynchus

  †Cotylorhynchus – type locality for genus
  • †Cotylorhynchus bransoni – type locality for species
  • †Cotylorhynchus romeri – type locality for species
• †Cranaena
  • †Cranaena globosa
  • †Cranaena salinensis – type locality for species
• Crania
  • †Crania minuta – type locality for species
• †Craniops
  • †Craniops tenuis
• †Crassispora
  • †Crassispora kosankei
• †Cravenoceras
• †Cremacrinus
• †Cricotillus
  • †Cricotillus brachydens

• 

  Illustration of a fossilized skull and ventral scutes of the Carboniferous-Permian reptile relative Cricotus. Edward Drinker Cope (1884).

  †Cricotus
  • †Cricotus crassidiscus
• †Crinerocrinus
• †Crinisarina
  • †Crinisarina prouti
• †Crinoedischia
  • †Crinoedischia noblensis – type locality for species
• †Cromyocrinus
  • †Cromyocrinus grandis
• †Crossotelos – type locality for genus
  • †Crossotelos annulatus – type locality for species
• †Crurithyris
  • †Crurithyris planoconvexa
• †Cruruthyris
  • †Cruruthyris planoconvexa
• †Crustaesporites
  • †Crustaesporites globulus – tentative report
• †Cryptophyllus
  • †Cryptophyllus gibbosum
  • †Cryptophyllus nuculopsis
  • †Cryptophyllus simpsoni
• †Cryptothyrella – tentative report
  • †Cryptothyrella ovoides

• 

  Fossil of the Carboniferous shark Ctenacanthus

  †Ctenacanthus – report made of unidentified related form or using admittedly obsolete nomenclature
• †Ctenobolbina
  • †Ctenobolbina abrupta
  • †Ctenobolbina bispinata
  • †Ctenobolbina cancellata
  • †Ctenobolbina inflata
  • †Ctenobolbina parva
  • †Ctenobolbina percarinata
  • †Ctenobolbina varicata
• †Cullisonia
  • †Cullisonia producta
• †Curtognathus
  • †Curtognathus cordiformis
  • †Curtognathus coronata
  • †Curtognathus limitaris
• †Cyathocystis
  • †Cyathocystis oklahomae
• †Cybeloides
• †Cybelopsis
• †Cycadopites
• †Cyclites
  • †Cyclites depressus – type locality for species
• †Cyclobathmus
  • †Cyclobathmus haworthi – type locality for species
• †Cycloceras
  • †Cycloceras meeki – type locality for species
  • †Cycloceras randolphensis
• †Cyclocystoides
• †Cyclogranisporites
  • †Cyclogranisporites aureus
  • †Cyclogranisporites leopoldi
  • †Cyclogranisporites microgranus
  • †Cyclogranisporites minutus
  • †Cyclogranisporites obliquus
  • †Cyclogranisporites orbicularis
• †Cyclonema
• †Cycloplectoceras
  • †Cycloplectoceras miseri

• 

  Fossilized foliage from the Carboniferous seed fern Cyclopteris

  †Cyclopteris
• †Cyclopuncta – type locality for genus
  • †Cyclopuncta girtyi – type locality for species
• †Cyclospira
  • †Cyclospira parva
• †Cyclozyga
  • †Cyclozyga neotenica – type locality for species
• †Cymatorhiza – type locality for genus
  • †Cymatorhiza kittsi – type locality for species
• †Cymatospira
  • †Cymatospira montfortianus

• 

  Fossil of the Late Ordovician-Late Devonian trilobite Cyphaspis

  †Cyphaspis
  • †Cyphaspis carrolli
• †Cyphoneurodes
  • †Cyphoneurodes patriciae – type locality for species
• †Cypricardella – tentative report
  • †Cypricardella enigmatica – type locality for species
• †Cyrtina
  • †Cyrtina dalmani
• †Cyrtograptus
• †Cyrtorizoceras
• †Cystiphyllum
• †Cystodictya
  • †Cystodictya elegans – type locality for species

D

• †Dactylogonia
  • †Dactylogonia sculpturata
  • †Dactylogonia subaequicostellata
• †Dalejina
  • †Dalejina henryhousensis
  • †Dalejina subtriangularis
• †Dalmanella
  • †Dalmanella edgewoodensis

• 

  Fossil of the Late Ordovician-Middle Devonian trilobite Dalmanites

  †Dalmanites
  • †Dalmanites ptyktorhion
  • †Dalmanites rutellum
• †Dapsilodus
  • †Dapsilodus obliquicostatus
  • †Dapsilodus praecipuus
  • †Dapsilodus sparsus
• †Decoriconus
  • †Decoriconus fragilis
• †Decoroproetus
  • †Decoroproetus anaglyptus
  • †Decoroproetus corycoeus
• †Dekayella
  • †Dekayella praenuntia
• †Delocrinus
  • †Delocrinus densus
  • †Delocrinus hemisphericus
  • †Delocrinus pentanodus – type locality for species
• †Deloia
  • †Deloia sulcata
• †Delopsocus
  • †Delopsocus elongatus
• †Delopterum
  • †Delopterum latum
  • †Delopterum minutum

• 

  Interpretive diagrams and fossils of a skull of the Permian primitive reptile Delorhynchus

  †Delorhynchus – type locality for genus
  • †Delorhynchus cifellii – type locality for species
  • †Delorhynchus priscus – type locality for species
• †Delotaxis
• †Delthyris
  • †Delthyris kozlowskii
• †Deltoidospora
  • †Deltoidospora adnata
  • †Deltoidospora grandis
  • †Deltoidospora levis
  • †Deltoidospora priddyi
  • †Deltoidospora sphaerotriangula
  • †Deltoidospora subadnatoides
• †Dendrocrinus
  • †Dendrocrinus latibranchiatus – or unidentified comparable form
  • †Dendrocrinus rusticus
• †Densosporites
  • †Densosporites sphaerotriangularis
• †Derbyia
  • †Derbyia crassa – or unidentified comparable form
• †Derbyoides – or unidentified related form
• †Desmoinesia
  • †Desmoinesia muricatina
• †Desmorthis
• †Diabolocrinus
• †Diacalymene
  • †Diacalymene clavicula

• 

  Fossilized skeleton of the Permian reptile relative Diadectes

  †Diadectes
  • †Diadectes zenos
• †Dianulites
  • †Dianulites fastigiatus
  • †Dianulites petropolitana
• †Diaphoroceras
• †Diaphorodendron
  • †Diaphorodendron dicentricum
  • †Diaphorodendron scleroticum
• †Diaphragmus
  • †Diaphragmus fasciculatus
• †Dibunophyllum
  • †Dibunophyllum hansoni – type locality for species
• †Dicamaropsis
  • †Dicamaropsis parva
• †Dicellograptus
  • †Dicellograptus gurleyi
  • †Dicellograptus mensurans
• †Diceromyonia
  • †Diceromyonia tersa – or unidentified comparable form
• †Dichentomum
  • †Dichentomum tinctum
• †Dichognathus
  • †Dichognathus extensa
  • †Dichognathus typica
• †Dicoelosia
  • †Dicoelosia oklahomenesis – type locality for species
  • †Dicoelosia oklahomensis
  • †Dicoelosia varica
• †Dicranella
  • †Dicranella fragilis
  • †Dicranella macrocarinata

• 

  Dicranurus

  †Dicranurus
  • †Dicranurus elegantus
  • †Dicranurus hamatus
• †Dicromyocrinus
  • †Dicromyocrinus medius – type locality for species
  • †Dicromyocrinus optimus
  • †Dicromyocrinus subaplatus – type locality for species
• †Dictybolos – type locality for genus
  • †Dictybolos tener – type locality for species
• †Dictyoclostus
  • †Dictyoclostus ingrata – or unidentified related form
  • †Dictyoclostus mesialis
• †Dictyonema
  • †Dictyonema francesiae
  • †Dictyonema rockcrossingensis
• †Dictyospongia
• †Dielasma
  • †Dielasma oklahomensis – type locality for species
• †Dierespongia – type locality for genus
  • †Dierespongia palla – type locality for species
• †Dimeropygiella

• 

  Life restoration of the Permian synapsid (mammal precursor) Dimetrodon

  †Dimetrodon
  • †Dimetrodon dollovianus
  • †Dimetrodon limbatus – or unidentified comparable form
  • †Dimetrodon loomisi
  • †Dimetrodon macrospondylus
• †Diphuicrinus
  • †Diphuicrinus croneisi
  • †Diphuicrinus dovelyensis
  • †Diphuicrinus faustus – type locality for species
  • †Diphuicrinus mammifer – type locality for species
  • †Diphuicrinus pentanodus – type locality for species

• 

  Fossilized axial skeleton of the Carboniferous-Permian amphibian Diplocaulus

  †Diplocaulus – type locality for genus
  • †Diplocaulus magnicornis
  • †Diplocaulus parvus – type locality for species
  • †Diplocaulus primus – type locality for species
• †Diplograptus
  • †Diplograptus maxwelli
• †Diplothmema
  • †Diplothmema pachyderma
• †Diplotrypa
  • †Diplotrypa bassleri
• †Discitoceras
• †Disparifusa
  • †Disparifusa hystricosa
• †Distacodus
  • †Distacodus oklahomensis – type locality for species
• †Ditaxineura
  • †Ditaxineura cellulosa
• †Ditoecholasma
• †Ditomopyge
  • †Ditomopyge parvulus – or unidentified comparable form
• †Dizygopleura
• †Doleotheca
• †Doleroides
  • †Doleroides compressus
  • †Doleroides oklahomensis
  • †Doleroides vescus
• †Dolerophyllum – tentative report
• †Dolerorthis
  • †Dolerorthis hami
  • †Dolerorthis nanella
  • †Dolerorthis savagei
• †Doleserpeton – type locality for genus
  • †Doleserpeton annectens – type locality for species
• †Dolichoharpes
  • †Dolichoharpes reticulata
• †Doliocrinus
• †Domatoceras
  • †Domatoceras collinsvillense – type locality for species
  • †Domatoceras williamsi
• †Donaldina
  • †Donaldina attenuata
  • †Donaldina grantonensis
• †Donezella
• †Donovaniconus
  • †Donovaniconus oklahomensis – type locality for species
• †Drepanoistodus
  • †Drepanoistodus suberectus
• †Dudleyaspis
• †Dunbarites
  • †Dunbarites rectilateralis
  • †Dunbarites wewokensis – type locality for species
• †Duncanella

E

• †Earlandinita
• †Eatonia
  • †Eatonia exserta
• †Ecculiomphalus – tentative report
• †Echinaria
• †Echinoconchus
  • †Echinoconchus elegans
• †Echinocrinus
  • †Echinocrinus cratis – or unidentified related form
• †Echinoencrinites – tentative report
  • †Echinoencrinites ornatus
• †Echinoprimitia
  • †Echinoprimitia imputata

• 

  Fossil of the Early-Middle Ordovician cystoid echinoderm Echinosphaerites

  †Echinosphaerites
  • †Echinosphaerites aurantium
• †Economolopsis
  • †Economolopsis anodontoides
• †Ectenaspis
  • †Ectenaspis burkhalteri – type locality for species
• †Ectenocrinus
• †Ectenoglossa – tentative report
  • †Ectenoglossa sculpta
• †Ectosteorhachis
  • †Ectosteorhachis nitidus – or unidentified comparable form

• 

  Life restoration of the Carboniferous-Permian synapsid (mammal precursor) Edaphosaurus

  †Edaphosaurus
  • †Edaphosaurus cruciger
• †Edestus – type locality for genus
  • †Edestus vorax – type locality for species
• †Edmondia
  • †Edmondia rotunda – type locality for species
  • †Edmondia senilis – or unidentified comparable form
  • †Edmondia splendens – type locality for species
• †Edriocrinus
• †Edriophus
• †Ehlersia
• †Elibatocrinus
  • †Elibatocrinus elongatus – or unidentified comparable form
• †Elmoa
  • †Elmoa trisecta
• †Elpidocrinus
  • †Elpidocrinus tuberosus
• †Embolaster – type locality for genus
  • †Embolaster graffhami – type locality for species
• †Emilites
  • †Emilites bennisoni – type locality for species
• †Enchostoma – tentative report
  • †Enchostoma bicarinatum – or unidentified comparable form
• †Endelocrinus
  • †Endelocrinus matheri
• †Endosporites
  • †Endosporites globiformis
  • †Endosporites plicatus
  • †Endosporites zonalis
• †Endothyra
  • †Endothyra bowmani
• †Endothyranella
• †Enteletes
• †Entelophyllum
• †Enterolasma
• †Eoasianites
• †Eochiton
  • †Eochiton arbucklensis – type locality for species
• †Eochonetes
  • †Eochonetes magna
• †Eodictyonella (formerly Dictyonella)
  • †Eodictyonella gibbosa
• †Eohippioceras
  • †Eohippioceras ferratum
• †Eohollina
  • †Eohollina depressa
  • †Eohollina papillata
• †Eoleperditia
  • †Eoleperditia fabulites
  • †Eoleperditia inflativentralis
• †Eolissochonetes
• †Eomartiniopsis
  • †Eomartiniopsis rostrata
• †Eomonorachus
  • †Eomonorachus divaricatus
• †Eopinnacrinus
• †Eopleurophorus – type locality for genus
  • †Eopleurophorus immaturus
  • †Eopleurophorus spinulosa – or unidentified comparable form
• †Eoprimitia
  • †Eoprimitia bailyana
  • †Eoprimitia cooperi
  • †Eoprimitia quadrata
  • †Eoprimitia subnodosa
• †Eorobergia
  • †Eorobergia marginalis – or unidentified comparable form
• †Eoschistoceras
  • †Eoschistoceras strawnense
• †Eospirifer
  • †Eospirifer acutolineatus
• †Eotomaria
• †Ephedripites
  • †Ephedripites corrugatus – type locality for species
• †Epiphyton
• †Equisetites
• †Equisetosporites
• †Eridoconcha
  • †Eridoconcha magna
  • †Eridoconcha simpsoni
• †Eridopora
  • †Eridopora radiata
  • †Eridopora stellata
• †Eridotrypa
  • †Eridotrypa abrupta
• †Erismodus – tentative report
• †Erisocrinus
  • †Erisocrinus wapanucka

• 

  Life restoration of the Carboniferous-Permian amphibian Eryops

  †Eryops
  • †Eryops megacephalus
• †Escharopora
  • †Escharopora recta
• †Estheria
• †Ethelocrinus – tentative report
  • †Ethelocrinus kirki

• 

  Fossilized holdfast of the Silurian-Middle Devonian crinoid ("sea lily") Eucalyptocrinites

  †Eucalyptocrinites
  • †Eucalyptocrinites pernodosus
• †Euchondria
  • †Euchondria subquadrata – type locality for species
• †Eucraterellina
  • †Eucraterellina oblonga
  • †Eucraterellina randolphi
  • †Eucraterellina spitznasi
• †Eucystis
• †Eudissoceras – type locality for genus
  • †Eudissoceras collinsvillense – type locality for species
• †Eukloedenella
• †Eumartynovia – type locality for genus
  • †Eumartynovia raaschi – type locality for species
• †Eumetria
  • †Eumetria deltoides – type locality for species
  • †Eumetria matheri – type locality for species
  • †Eumetria vera
  • †Eumetria verneuiliana
• †Eumorphoceras
  • †Eumorphoceras bisulcatum
  • †Eumorphoceras girtyi
• †Eumorphocystis
  • †Eumorphocystis multiporata
• †Euonychocrinus
• †Eupachycrinus
  • †Eupachycrinus magister – or unidentified comparable form
  • †Eupachycrinus verrucosus
• †Euphemites
  • †Euphemites carbonarius
  • †Euphemites compressus – type locality for species
• †Eurychilina
  • †Eurychilina papillata
  • †Eurychilina subradiata
  • †Eurychilina ventrosa
• †Eurygonum
  • †Eurygonum nodosum
• †Euryodus
  • †Euryodus dalyae – type locality for species
  • †Euryodus primus – or unidentified comparable form
• †Eusphenopteris
  • †Eusphenopteris scribanii-striata – informal
• †Euspirocrinus
  • †Euspirocrinus cirratus
• †Exocrinus
• †Exoriocrinus

F

• †Failleana
  • †Failleana limbata – or unidentified comparable form
• †Falcisporites
  • †Falcisporites zapfei
• †Fardenia
  • †Fardenia attenuata
  • †Fardenia reedsi
• †Fascichnus
  • †Fascichnus dactylus
  • †Fascichnus frutex
• †Fascifera
  • †Fascifera dalmanelloidea
• †Fastigatisporites
  • †Fastigatisporites physema – type locality for species
• †Favosites
• †Fayella – type locality for genus
  • †Fayella chickashaensis – type locality for species

• 

  Fossilized skull in multiple views of the Permian primitive reptile Feeserpeton

  †Feeserpeton – type locality for genus
  • †Feeserpeton oklahomensis – type locality for species
• †Fenestella
  • †Fenestella ardmorensis
  • †Fenestella bendensis – type locality for species
  • †Fenestella cestriensis
  • †Fenestella chesterensis – or unidentified comparable form
  • †Fenestella cumingsi
  • †Fenestella exigua
  • †Fenestella frutex – or unidentified comparable form
  • †Fenestella granularis – type locality for species
  • †Fenestella kosomensis – type locality for species
  • †Fenestella morrowensis
  • †Fenestella oklahomensis – type locality for species
  • †Fenestella ovatipora – type locality for species
  • †Fenestella paradisensis
  • †Fenestella rara – type locality for species
  • †Fenestella serratula
• †Fenesteverta – type locality for genus
  • †Fenesteverta nicklesi – type locality for species
• †Fernglenia
  • †Fernglenia vernonensis
• †Finkelnburgia
  • †Finkelnburgia crassicostata
• †Fistulipora
• †Flexifenestella
  • †Flexifenestella grandis – type locality for species
• †Florinites
  • †Florinites mediapudens
  • †Florinites millotti
  • †Florinites similis
  • †Florinites visendus
  • †Florinites volans
• †Foerstediscus
• †Foerstia
  • †Foerstia ohioensis
• †Fragiscutellum
  • †Fragiscutellum glebalis
• †Fragiscutum

• 

  Fossil in an enrolled posture of the Late Ordovician trilobite Frencrinuroides

  †Frencrinuroides
  • †Frencrinuroides capitonis
• †Fusulina

G

• †Galateacrinus
• †Gardenasporites
  • †Gardenasporites heisselii
• †Garwoodia
• †Gastrioceras
  • †Gastrioceras adaense
  • †Gastrioceras fittsi
  • †Gastrioceras prone – type locality for species
  • †Gastrioceras retiferum – type locality for species
• †Gazacrinus
  • †Gazacrinus stellatus
• †Gelasinocephalus
  • †Gelasinocephalus pustulosus
  • †Gelasinocephalus whittingtoni
• †Geniculifera
  • †Geniculifera siphuncula – type locality for species
• †Gigagramma – type locality for genus
  • †Gigagramma carpenteri – type locality for species
• †Gigantopteris
  • †Gigantopteris americana
• †Girtycoelia
• †Girtyella
• †Girtyspira
  • †Girtyspira alvaensis – type locality for species
• †Girvanella
• †Gissocrinus
  • †Gissocrinus quadratus
• †Glabovalvulina – tentative report
• †Glabrocingulum
  • †Glabrocingulum grayvillense
  • †Glabrocingulum stellaeformis
  • †Glabrocingulum wannense – type locality for species
• †Glaphurochiton
• †Glaphyrites
  • †Glaphyrites angulatus
  • †Glaphyrites excelsus – type locality for species
  • †Glaphyrites hyattianus
  • †Glaphyrites subdiscus
  • †Glaphyrites warei – type locality for species
• †Glaphyrophlebia
  • †Glaphyrophlebia anderhalterorum – type locality for species
• †Glaukosocrinus
• †Globivalvulina
• †Globovalvulina
• †Globulocystites
  • †Globulocystites cristatus
  • †Globulocystites infundus
• †Glosella
  • †Glosella liumbona
• †Gloverilima
  • †Gloverilima pratti
• †Glymmatobolbina
  • †Glymmatobolbina quadrata
• †Glyprorthis
  • †Glyprorthis costellata
• †Glyptocystella
  • †Glyptocystella loeblichae
• †Glyptocystites
  • †Glyptocystites forbesi
  • †Glyptocystites loeblichae
  • †Glyptocystites logani
  • †Glyptocystites multiporus
  • †Glyptocystites regnelli – or unidentified comparable form
• †Glyptopleura
  • †Glyptopleura geisi – type locality for species
  • †Glyptopleura scotti – type locality for species
  • †Glyptopleura warthini – type locality for species
• †Glyptorthis
  • †Glyptorthis crenulata – type locality for species
  • †Glyptorthis glaseri
  • †Glyptorthis obesa – type locality for species
  • †Glyptorthis uncinata – type locality for species
• †Gnathodus

• 

  Life restoration of the Permian lungfish Gnathorhiza

  †Gnathorhiza
  • †Gnathorhiza serrata
• †Gnetalesaccus
  • †Gnetalesaccus variabilis
• †Gnorimocrinus
  • †Gnorimocrinus pontotocensis
• †Goniasma

• 

  Fossilized shell of the Late Devonian-Late Triassic ammonoid cephalopod Goniatites

  †Goniatites
  • †Goniatites multiliratus – type locality for species
• †Gonioglyphioceras
  • †Gonioglyphioceras gracile
• †Gonioloboceratoides
• †Goniophora
• †Gorgonisphaeridium
  • †Gorgonisphaeridium antiquum
• †Gotlandochiton
  • †Gotlandochiton hami – type locality for species
• †Graffhamicrinus
  • †Graffhamicrinus antiquus
• †Grammolomatella
• †Granasporites
  • †Granasporites medius
• †Grandfieldia – type locality for genus
  • †Grandfieldia callilepidota – type locality for species
• †Granulatisporites
  • †Granulatisporites granularis
  • †Granulatisporites granulatus
  • †Granulatisporites microgranifer
  • †Granulatisporites minutus
  • †Granulatisporites verrucosus
• †Graptodictya
  • †Graptodictya elegantula
• †Griffithidella
  • †Griffithidella alternata
  • †Griffithidella doris
• †Gryphellina
  • †Gryphellina sellardsi – type locality for species
• †Grypocrinus
• †Gyalorhethium
  • †Gyalorhethium chondrodes

• 

  Fossils of the Carboniferous coral Gymnophyllum, also known as button coral

  †Gymnophyllum
  • †Gymnophyllum wardi
• †Gypidula
  • †Gypidula multicostata
• †Gyronema

H

• †Hagnocrinus
• †Halliella
  • †Halliella labiosa

• 

  Fossil of the Ordovician bryozoan ("moss animal") Hallopora

  †Hallopora
  • †Hallopora dubia
  • †Hallopora macrostoma
  • †Hallopora multitabulata
  • †Hallopora pachymura
• †Halysites
• †Hamiapollenites – type locality for genus
  • †Hamiapollenites karrooensis
  • †Hamiapollenites saccatus – type locality for species
  • †Hamiapollenites tractiferinus
• †Haplistion
  • †Haplistion apletum – type locality for species
• †Hapsidopareion – type locality for genus
  • †Hapsidopareion lepton – type locality for species
• †Harpidella
  • †Harpidella butorus
• †Harpillaenus
• †Healdia
  • †Healdia caneyensis
  • †Healdia compressa
  • †Healdia harltoni – type locality for species
  • †Healdia simplicissima – type locality for species
• †Hebetorthoceras
  • †Hebetorthoceras brokenarrowense
• †Heliolites
• †Heliosocrinus
  • †Heliosocrinus neotosus – type locality for species
• †Helminthochiton
  • †Helminthochiton riddlei
• †Hemiliroceras
  • †Hemiliroceras reticulatum – type locality for species
• †Hemiphragma
  • †Hemiphragma irrasum
  • †Hemiphragma pulchra
• †Hesperocystis
  • †Hesperocystis deckeri
• †Hesperorthis
  • †Hesperorthis crinerensis
  • †Hesperorthis rowlandi
  • †Hesperorthis sulcata
• †Heterangium
• †Heteropecten
  • †Heteropecten vanvleeti – type locality for species
• †Heterotrypa
  • †Heterotrypa taffi
• †Hexacrinites
  • †Hexacrinites adaensis
  • †Hexacrinites carinatus
• †Hibbertia
• †Hindia
• †Hindiodella
• †Hippocrepina
  • †Hippocrepina bendensis
• †Hiscobeccus
  • †Hiscobeccus capax
• †Hoffmeisterites – type locality for genus
  • †Hoffmeisterites microdens – type locality for species
• †Holcospermum
• †Hollinella
  • †Hollinella burlingamensis
  • †Hollinella radiata
• †Holmesella
  • †Holmesella triangularis – type locality for species
  • †Holmesella wapanuckensis – type locality for species

• 

  Fossilized shells of the Ordovician-Carboniferous sea snail Holopea

  †Holopea – tentative report
• †Homocladus
  • †Homocladus grandis
• †Homoeospira
  • †Homoeospira costatula
  • †Homoeospira foerstei
  • †Homoeospira subgibbosa
• †Homotrypa
  • †Homotrypa callitoecha
  • †Homotrypa dickeyvillensis
  • †Homotrypa multitabulata
  • †Homotrypa sagittata
  • †Homotrypa tuberculata
  • †Homotrypa ulrichi
• †Hormotoma
• †Howellella
  • †Howellella cycloptera
  • †Howellella henryhousensis
  • †Howellella splendens
• †Hudsonaster
• †Huntonella – type locality for genus
  • †Huntonella unicornis – type locality for species

• 

  Fossil of the Early Devonian trilobite Huntoniatonia

  †Huntoniatonia
  • †Huntoniatonia huntonensis
  • †Huntoniatonia lingulifer
  • †Huntoniatonia oklahomae
  • †Huntoniatonia purduei
• †Hustedia
  • †Hustedia mormoni – or unidentified comparable form
• †Hybocrinus
  • †Hybocrinus conicus
  • †Hybocrinus crinerensis
  • †Hybocrinus nitidus
  • †Hybocrinus pyxidatus
• †Hydreionocrinus
  • †Hydreionocrinus patulus
• Hyperammina
  • †Hyperammina elongata
  • †Hyperammina johnsvalleyensis – type locality for species
  • †Hyperammina rugosa
• †Hyperamminoides
  • †Hyperamminoides glabra
• †Hyperchilarina
  • †Hyperchilarina nodosimarginata
• †Hypergonia
  • †Hypergonia quadricarinata – or unidentified comparable form
  • †Hypergonia tatei – or unidentified related form

I

• †Ianthinopsis
• †Icthyocrinus
  • †Icthyocrinus corbis
• †Idiognathodus
  • †Idiognathodus delicates
  • †Idiognathodus sinuatus

• 

  Fossil of the Middle Ordovician trilobite Illaenus

  †Illaenus
  • †Illaenus utahensis – or unidentified comparable form
• †Illenites
  • †Illenites delasaucei
  • †Illenites parvus
• †Inflatia
  • †Inflatia cherokeensis
  • †Inflatia clydensis
  • †Inflatia cooperi
  • †Inflatia gracilis
  • †Inflatia inflata
  • †Inflatia pusilla
  • †Inflatia succincta – type locality for species
• †Ischyrotoma
  • †Ischyrotoma sila
• †Isoallagecrinus
  • †Isoallagecrinus barnettensis – type locality for species
• †Isochilina
  • †Isochilina bulbosa
• †Isorthis
  • †Isorthis arcuaria
  • †Isorthis pygmaea
• †Isoteloides
  • †Isoteloides peri

• 

  Fossil of the Middle-Late Ordovician giant trilobite Isotelus.

  †Isotelus
  • †Isotelus bradleyi – type locality for species
  • †Isotelus violaensis – type locality for species
• †Ivanovia – tentative report
• †Ivoechiton
  • †Ivoechiton calathicolus – type locality for species
  • †Ivoechiton oklahomensis – type locality for species

J

• †Janusella
  • †Janusella biceratina
• †Jeffersonia
  • †Jeffersonia granosa
  • †Jeffersonia jenni
  • †Jeffersonia ulrichi
• †Jonesina
  • †Jonesina spinigera – or unidentified comparable form
• †Jonesites
  • †Jonesites circa
  • †Jonesites huntonensis – type locality for species
• †Juresania

K

• 

  Fossils of the Early Devonian trilobite Kainops

  †Kainops
  • †Kainops invius
  • †Kainops raymondi
• †Kallimorphocrinus
  • †Kallimorphocrinus eaglei – type locality for species
• †Kawina
• †Kayina
  • †Kayina hybosa
  • †Kayina porosa
• †Kennedya
  • †Kennedya fraseri – type locality for species
  • †Kennedya mirabilis
• †Keokukia
  • †Keokukia sulcata
• †Kettneraspis
  • †Kettneraspis williamsi
• †Kirkbya
  • †Kirkbya bendensis – type locality for species
  • †Kirkbya moorei
  • †Kirkbya symmetrica
• †Kirkbyella
  • †Kirkbyella obliqua
• †Kirkidium
• †Kirkocystis – type locality for genus
  • †Kirkocystis papillata – type locality for species
• †Kitakamithyris
  • †Kitakamithyris cooperensis
• †Klausipollenites
  • †Klausipollenites aequus
  • †Klausipollenites schaubergeri
• †Knightites
  • †Knightites montfortianum
• †Knightoceras
  • †Knightoceras patulum
• †Kockelella
  • †Kockelella amsdeni
  • †Kockelella crassa
  • †Kockelella ortus
  • †Kockelella patula
  • †Kockelella ranuliformis
  • †Kockelella stauros
  • †Kockelella variabilis
  • †Kockelella walliseri
• †Kosovopeltis
• †Kozlowskia
  • †Kozlowskia splendens
• †Kozlowskiellina
  • †Kozlowskiellina vaningeni
• †Krausella
  • †Krausella arcuata
• †Krotovia
• †Kukalova – type locality for genus
  • †Kukalova americana – type locality for species

L

• †Labidosaurikos – type locality for genus
  • †Labidosaurikos meachami – type locality for species

• 

  Life restoration of the Permian reptile Labidosaurus

  †Labidosaurus
• †Labiisporites
  • †Labiisporites granulatus
• †Laeviatosporites
  • †Laeviatosporites ovalis
• Laevidentalium
  • †Laevidentalium venustum – or unidentified comparable form
• †Laevigatosporites
  • †Laevigatosporites desmoinesensis
  • †Laevigatosporites globosus
  • †Laevigatosporites medius
  • †Laevigatosporites ovalis
  • †Laevigatosporites striatus
  • †Laevigatosporites vulgaris
• †Lamellosathyris
  • †Lamellosathyris lamellosa
• †Lampterocrinus
  • †Lampterocrinus fatigatus
• †Lasanocrinus
  • †Lasanocrinus daileyi
  • †Lasanocrinus minutus – type locality for species
  • †Lasanocrinus multinodulus – type locality for species
  • †Lasanocrinus nodatus – type locality for species
  • †Lasanocrinus nodus – type locality for species
  • †Lasanocrinus strigosus
• †Latosporites
  • †Latosporites minutus
• †Leangella
  • †Leangella dissiticostella
• †Lecanocrinus
  • †Lecanocrinus erectus
• †Lecythiocrinus
  • †Lecythiocrinus asymmetricus – type locality for species
• †Leioclema
  • †Leioclema dozierense
  • †Leioclema pushmatahensis – type locality for species
• †Leiovalia
  • †Leiovalia scaberula
  • †Leiovalia teretis
• †Lemmatophora
  • †Lemmatophora typa

• 

  Fossil of the Late Ordovician-Middle Devonian trilobite Leonaspis

  †Leonaspis
  • †Leonaspis williamsi
• †Lepadocystites
  • †Lepadocystites moorei – tentative report
• †Leperditella
  • †Leperditella aequilatera
  • †Leperditella altiforma
  • †Leperditella deckeri
  • †Leperditella incisa
  • †Leperditella jonesinoides
  • †Leperditella minima
  • †Leperditella porosa
  • †Leperditella rex
  • †Leperditella tumida
• †Leperditia
• †Lepidocoelus
• †Lepidocyclus
  • †Lepidocyclus cooperi
  • †Lepidocyclus manniensis – tentative report
  • †Lepidocyclus oblongus
  • †Lepidocyclus perlamellosus

• 

  Life restoration of the Carboniferous tree-sized club moss relative Lepidodendron

  †Lepidodendron
  • †Lepidodendron hickii
• †Lepidophloios
  • †Lepidophloios hallii/johnsonii
• †Leptaena
  • †Leptaena acuticuspidata – type locality for species
  • †Leptaena oklahomensis – type locality for species
• †Leptaenisca
  • †Leptaenisca concava
  • †Leptaenisca irregularis
• †Leptagonia
  • †Leptagonia analoga
• †Leptochirognathus
  • †Leptochirognathus extensa
• †Leptodesma
  • †Leptodesma gouldii – type locality for species
  • †Leptodesma matheri – type locality for species
  • †Leptodesma stenzeli – type locality for species
• †Leptoskelidion – tentative report
  • †Leptoskelidion septulosum
• †Leptostrophia
  • †Leptostrophia beckii
• †Levenea
  • †Levenea subcarinata
• †Ligogramma – type locality for genus
  • †Ligogramma sinuosa – type locality for species
  • †Ligogramma wichita – type locality for species
• †Limipecten
  • †Limipecten newelli – type locality for species
• †Lindosroemella
  • †Lindosroemella patula – or unidentified comparable form
• †Lindostoemella
  • †Lindostoemella patula – or unidentified comparable form
• †Lindostroemella
  • †Lindostroemella patula – or unidentified comparable form
• Lingula
  • †Lingula carbonaria – or unidentified comparable form
  • †Lingula eva
  • †Lingula paracletus – or unidentified comparable form
• †Lingulasma
  • †Lingulasma oklahomense

• 

  Illustration of a fossilized shell of the Cambrian-Late Ordovician brachiopod Lingulella

  †Lingulella
  • †Lingulella galba
  • †Lingulella glypta
• †Linoproductus
  • †Linoproductus delawarii – type locality for species
  • †Linoproductus ovatus
  • †Linoproductus prattenianus
• †Liomolgocrinus
• †Liomopterella
  • †Liomopterella pediaecetae – type locality for species
• †Liomopterum
  • †Liomopterum ornatum
• †Liospira
• †Liroceras
  • †Liroceras liratum
• †Lisca
  • †Lisca minuta
• †Lissatrypa
  • †Lissatrypa clairensis
  • †Lissatrypa concentrica
  • †Lissatrypa decaturensis
  • †Lissatrypa henryhousensis
  • †Lissatrypa parvula
• †Lissostrophia
  • †Lissostrophia cooperi
  • †Lissostrophia lindenensis
  • †Lissostrophia lindensis
• Lithophaga
• Lituotuba

• 

  Life restoration of the Permian amphibian Llistrofus

  †Llistrofus – type locality for genus
  • †Llistrofus pricei – type locality for species
• †Lonchodomas
  • †Lonchodomas mcgeheei
• †Lonchodus
• †Lophamplexus
  • †Lophamplexus brevifolius – type locality for species
  • †Lophamplexus lutarius – type locality for species
  • †Lophamplexus spanius – type locality for species
  • †Lophamplexus vagus – type locality for species
• †Lophophyllidium
  • †Lophophyllidium asarcum – type locality for species
  • †Lophophyllidium compressum – type locality for species
  • †Lophophyllidium hadrum
  • †Lophophyllidium profundum
  • †Lophophyllidium wewokanum – type locality for species
• †Lophophyllum
• †Lophospira
• †Lophotichium
  • †Lophotichium amoenum
• †Lophotriletes
  • †Lophotriletes commissuralis
  • †Lophotriletes ibrahimii
  • †Lophotriletes microsaetosus
  • †Lophotriletes pseudaculeatus
  • †Lophotriletes rarispinosus
• †Lophpophyllum
  • †Lophpophyllum profundum – or unidentified comparable form
• †Loxoedischia – type locality for genus
  • †Loxoedischia drewi – type locality for species
• †Lueckisporites
  • †Lueckisporites fimbriatus
  • †Lueckisporites virkkiae
• †Lunaferamita
  • †Lunaferamita bassleri
  • †Lunaferamita virginiensis
• †Lundbladispora
• †Lunulasporites – type locality for genus
  • †Lunulasporites vulgaris – type locality for species
• †Lutesvillia
  • †Lutesvillia bispinosa
• †Lycospora
  • †Lycospora granulata
  • †Lycospora micropapillata
  • †Lycospora pellucida
  • †Lycospora pusilla
  • †Lycospora rotuda
  • †Lycospora rotunda
• †Lyroschizodus
  • †Lyroschizodus oklahomensis – type locality for species

• 

  Life restoration of the Permian snake-like amphibian Lysorophus showing speculative egg-coiling behavior

  †Lysorophus
  • †Lysorophus tricarinatus

M

• †Maclurites

• 

  Life restoration of the Permian primitive reptile Macroleter

  †Macroleter
  • †Macroleter agilis – type locality for species
• †Macropotamorhynchus
  • †Macropotamorhynchus tuta
• †Macrostylocrinus
  • †Macrostylocrinus striatus
• †Mandalocystis – type locality for genus
  • †Mandalocystis dockeryi – type locality for species
• †Manespira
  • †Manespira costata
  • †Manespira elongata
  • †Manespira magnicostata
• †Marginatia
  • †Marginatia magna
• †Marginifera
• †Marginovatia
  • †Marginovatia manardensis
  • †Marginovatia minor
  • †Marginovatia pumila
• †Mariopteris
  • †Mariopteris nervosa
  • †Mariopteris occidentalis
• †Marsupiocrinus
  • †Marsupiocrinus stellatus
• †Marsupipollenites
  • †Marsupipollenites striatus
• †Martynovia
  • †Martynovia halli – type locality for species
  • †Martynovia longipennis – type locality for species
• †Mastigograptus
• †Matonisporites
• †Maurotarion
  • †Maurotarion axitiosum
• †Maximites
  • †Maximites oklahomensis – type locality for species
• †Mcqueenoceras
• †Meekella
  • †Meekella striatocostata
• †Meekopinna
• †Meekopora
• †Meekospira
  • †Meekospira choctawensis
  • †Meekospira peracuta
• †Megactenopetalus
  • †Megactenopetalus kaibabanus
• †Megaglossoceras
• †Megakozlowskiella
  • †Megakozlowskiella velata
• †Megaliocrinus
  • †Megaliocrinus aplatus
• †Megamyonia
  • †Megamyonia mankini
• †Meganeuropsis
  • †Meganeuropsis americana – type locality for species
• †Merista
  • †Merista oklahomensis

• 

  Illustration (lower right, entry 15) of a fossilized shell in front and side views of the Silurian-Late Devonian brachiopod Meristella

  †Meristella
  • †Meristella atoka
• †Meristina
  • †Meristina claritensis
  • †Meristina roemeri
• †Mescalites
  • †Mescalites discoidalis
• †Mesolobus
• †Mesotrypa
  • †Mesotrypa angularis
  • †Mesotrypa favosa
  • †Mesotrypa tubulifera
• †Mesoxylon
• †Metachorus
  • †Metachorus striolatus – type locality for species

• 

  Fossilized shell of the Carboniferous-Permian nautiloid cephalopod Metacoceras

  †Metacoceras
  • †Metacoceras cornutum
  • †Metacoceras sinuosum
  • †Metacoceras vagans – type locality for species
• †Metaconularia
• †Metacromyocrinus
  • †Metacromyocrinus fundundus – type locality for species
  • †Metacromyocrinus papulosus
• †Metutharocrinus
  • †Metutharocrinus cockei
  • †Metutharocrinus spinifer – type locality for species
  • †Metutharocrinus undulatus – type locality for species
• †Michelinia
  • †Michelinia meekana
• †Michelinoceras
  • †Michelinoceras directum
  • †Michelinoceras wapanuckense

• 

  Life restoration of the Permian amphibian Micraroter

  †Micraroter – type locality for genus
  • †Micraroter erythrogeios – type locality for species
• †Microcaracrinus
  • †Microcaracrinus delicatus
• †Microcoelodus
  • †Microcoelodus asymmetricus
  • †Microcoelodus inornatus
  • †Microcoelodus intermedius
  • †Microcoelodus minutidentatus
  • †Microcoelodus typus
• †Microleter – type locality for genus
  • †Microleter mckinzieorum – type locality for species
• †Microreticulatisporites
  • †Microreticulatisporites nobilis
  • †Microreticulatisporites sulcatus
• †Microschmidtella
  • †Microschmidtella berdanae – type locality for species
  • †Microschmidtella hami – type locality for species
• †Microspermopteris
  • †Microspermopteris aphyllum
• †Micula – tentative report
• †Midcopterum – type locality for genus
  • †Midcopterum evidens – type locality for species
• †Mimella
  • †Mimella extensa
  • †Mimella subquadrata
• †Misthodotes
  • †Misthodotes edmundsi – type locality for species
  • †Misthodotes ovalis
• †Mitorthoceras
  • †Mitorthoceras crebriliratum – type locality for species
  • †Mitorthoceras perfilosum
• †Modiolopsis – tentative report
• Modiolus
• †Monoceratella
  • †Monoceratella brevispinata
• †Monoceratina
  • †Monoceratina ardmorensis
  • †Monoceratina ventralis

• 

  Fossils of the Early Devonian graptolite Monograptus

  †Monograptus
• †Monticuliporella
  • †Monticuliporella croneisi
  • †Monticuliporella peculiaris
  • †Monticuliporella shideleri
• †Mooreina
  • †Mooreina johnsvalleyensis – type locality for species
• †Mooreisporites
  • †Mooreisporites inusitatus
• †Mooreoceras
• †Moorites
• †Moravia
  • †Moravia grandis – type locality for species
• †Moundocrinus
  • †Moundocrinus coalensis – type locality for species
• †Mucrosaccus
  • †Mucrosaccus alatus – type locality for species
• †Multicostella
  • †Multicostella convexa
  • †Multicostella sulcata
• †Multidentodus – type locality for genus
  • †Multidentodus brevis – type locality for species
  • †Multidentodus gracilis – type locality for species
  • †Multidentodus irregularis – type locality for species
  • †Multidentodus johnsvalleyensis – type locality for species
  • †Multidentodus typicus – type locality for species
  • †Multidentodus wapanuckensis – type locality for species
• †Murinella
  • †Murinella partita
• †Murospora
  • †Murospora kosankei
• †Myalina
  • †Myalina lepta

• 

  Life restoration of the Permian synapsid (mammal precursor) Mycterosaurus

  †Mycterosaurus – type locality for genus
  • †Mycterosaurus longiceps – type locality for species
• †Myeinocystites
  • †Myeinocystites natus
• †Myelodactylus

N

• †Nanicrinus
  • †Nanicrinus papillatus
• †Nannaroter – type locality for genus
  • †Nannaroter mckinziei – type locality for species
• †Nannospondylus – type locality for genus
  • †Nannospondylus stewarti – type locality for species
• †Naticonema

• 

  Fossilized shell of the Early Devonian – Triassic sea snail Naticopsis

  †Naticopsis
  • †Naticopsis transversa – type locality for species
• †Navispira
  • †Navispira saffordi
• †Neoarchaeocrinus
  • †Neoarchaeocrinus necopinus
• †Neochonetes
  • †Neochonetes granulifer
• †Neodimorphoceras
  • †Neodimorphoceras oklahomae
• †Neoglyphioceras
  • †Neoglyphioceras caneyanum – type locality for species
• †Neoisorophusella
  • †Neoisorophusella whitesidei – type locality for species
• †Neokoninckophyllum
  • †Neokoninckophyllum acolumnatum
  • †Neokoninckophyllum tushanense
• †Neoraistrickia
• †Neospirifer
  • †Neospirifer dunbari
• †Neostrophia
  • †Neostrophia gregaria
• †Neothlipsura
  • †Neothlipsura furca

• 

  Fronds of the Carboniferous seed fern Neuropteris

  †Neuropteris
  • †Neuropteris heterophylla
  • †Neuropteris macrophylla
  • †Neuropteris obliqua
  • †Neuropteris osmundae
  • †Neuropteris rarinervis
• †Nicholsonella
  • †Nicholsonella acanthobscura
  • †Nicholsonella irregularis
  • †Nicholsonella laminata
  • †Nicholsonella moniliformis
• †Nobloedischia – type locality for genus
  • †Nobloedischia rasnitsyni – type locality for species
• †Nodosinella
  • †Nodosinella glennensis – type locality for species
• †Nucleospira
  • †Nucleospira concentrica
  • †Nucleospira ventricosa

• 

  Interior of a fossilized shell of the Early Ordovician-modern marine bivalve Nucula

  Nucula
• Nuculana
• †Nuculavus
• †Nuculopsis
  • †Nuculopsis girtyi
  • †Nuculopsis subventricosa
  • †Nuculopsis wewoka
  • †Nuculopsis wewokana
• †Nudauris
  • †Nudauris reticulata
• †Nuferella
  • †Nuferella rothi – type locality for species
• †Nummicrinus
  • †Nummicrinus brevis
  • †Nummicrinus papilloseous
• †Nummulostegina
  • †Nummulostegina ardmorensis – type locality for species
• †Nuskoisporites
  • †Nuskoisporites renulatus – type locality for species

O

• †Obturamentella – type locality for genus
  • †Obturamentella wadei
• †Octonaria

• 

  Fossil of the Silurian-Devonian trilobite Odontochile

  †Odontochile
  • †Odontochile syncrama
  • †Odontochile taffi
• †Odontopteris
  • †Odontopteris permiensis – or unidentified comparable form
• †Oepikina
  • †Oepikina expatiata
  • †Oepikina extensa
  • †Oepikina formosa
  • †Oepikina gregaria
• †Oinochoe
  • †Oinochoe coccymelum – type locality for species
• †Oistodus
  • †Oistodus abundans
  • †Oistodus inclinatus
• †Oklahomacrinus
  • †Oklahomacrinus frostae
• †Oklahomacystis
  • †Oklahomacystis spissus
  • †Oklahomacystis tribrachiatus
• †Oklahomasporites – type locality for genus
  • †Oklahomasporites majori – type locality for species
• †Oligophyllum – or unidentified comparable form
• †Oligotypus
  • †Oligotypus tillyardi
• † Oliveria
• †Oltulocrinus
• †Omphalotrochus
  • †Omphalotrochus wolfcampensis
• †Onniella – tentative report
• †Onychoplecia
  • †Onychoplecia tenuis
• †Onychotreta
  • †Onychotreta multiplicata

• 

  Life restoration of the Carboniferous-Permian synapsid (mammal precursor) Ophiacodon

  †Ophiacodon
  • †Ophiacodon major
  • †Ophiacodon mirus – or unidentified comparable form
  • †Ophiacodon uniformis
• †Ophiletina
  • †Ophiletina bromidensis – type locality for species
• †Opisthodontosaurus – type locality for genus
  • †Opisthodontosaurus carrolli – type locality for species
• †Orbiculoidea
  • †Orbiculoidea eximia
• †Orbignyella
  • †Orbignyella sublamellosa
• †Orobias
  • †Orobias ciscoensis
• †Oromycter – type locality for genus
  • †Oromycter dolesorum – type locality for species
• †Orovenator – type locality for genus
  • †Orovenator mayorum – type locality for species

• 

  Life restoration of the Carboniferous-Permian freshwater shark Orthacanthus

  †Orthacanthus
  • †Orthacanthus compressus
• †Orthoceras
• †Orthograptus
  • †Orthograptus eucharis
• †Orthonema
• †Orthosphaeridium
  • †Orthosphaeridium vibrissiferum
• †Orthostrophella
  • †Orthostrophella clairensis
• †Orthostrophia
  • †Orthostrophia brownsportensis – or unidentified comparable form
  • †Orthostrophia strophomenoides
• †Orthotetes
  • †Orthotetes kaskaskiensis
  • †Orthotetes springerensis – type locality for species
• †Otarion
  • †Otarion axitosum – type locality for species
• †Ottonosia
• †Oulodus
  • †Oulodus siluricus
• †Ovatia
  • †Ovatia laevicosta
• †Oxoplecia
  • †Oxoplecia filosa
  • †Oxoplecia gouldi
• †Oxyprora
  • †Oxyprora oklahomaense
  • †Oxyprora sayrei – type locality for species
• †Ozarkodina
  • †Ozarkodina bohemica
  • †Ozarkodina confluens
  • †Ozarkodina crassa
  • †Ozarkodina sagitta

P

• †Pachydictya
  • †Pachydictya bromidensis
  • †Pachydictya sheldonensis
• †Pachydomella
  • †Pachydomella sohni – type locality for species
• †Pachyglossella
  • †Pachyglossella biconvexa
• †Pachylyroceras
  • †Pachylyroceras cloudi

• 

  Fossil of the trilobite Paciphacops

  †Paciphacops
  • †Paciphacops birdsongensis – or unidentified comparable form
  • †Paciphacops campbelli
  • †Paciphacops raymondi
• †Paladin
  • †Paladin morrowensis
  • †Paladin mucronatus – tentative report
• Palaeoaplysina – tentative report
• †Palaeocapulus – tentative report
  • †Palaeocapulus acutirostre – or unidentified comparable form
• †Palaeocrinus
  • †Palaeocrinus hudsoni
• †Palaeocystites – tentative report
• †Palaeolima
  • †Palaeolima inequicostata
• †Palaeoneilo
• †Palaeostylus
• †Palaeotextularia
• †Palaeozygopleura
  • †Palaeozygopleura parva – tentative report
• †Palecocrinus – tentative report
• †Paleochiton
  • †Paleochiton kindbladensis – type locality for species
• †Paleohyperamum – type locality for genus
  • †Paleohyperamum pottsvillensis – type locality for species
• †Paleotextularia
• †Paleuthygramma
  • †Paleuthygramma acuta – type locality for species
• †Paleyoldia
  • †Paleyoldia glabra
• †Palliseria
  • †Palliseria robusta
• †Palmerocrinus
  • †Palmerocrinus profundus – type locality for species
• †Paltodus
  • †Paltodus compressus
• †Pandaspinapyga
  • †Pandaspinapyga salsa
• †Panderodus
  • †Panderodus equicostatus
  • †Panderodus gracilis
  • †Panderodus greenlandensis
  • †Panderodus panderi
  • †Panderodus unicostatus
• †Parabolbina
  • †Parabolbina scotti
• †Paraconularia
• †Paracremacrinus
  • †Paracremacrinus laticardinalis
• †Paracromyocrinus
  • †Paracromyocrinus oklahomensis
  • †Paracromyocrinus planatus – type locality for species
• †Paradiabolocrinus
• †Paraechmina
• †Paragassizocrinus
  • †Paragassizocrinus tarri
• †Parahealdia
  • †Parahealdia quaesita
• †Paralegoceras
  • †Paralegoceras iowense
  • †Paralegoceras textum
• †Parallelodon
  • †Parallelodon vokesi – type locality for species
• †Paramelocrinus
  • †Paramelocrinus ubaghsi
• †Paramphicrinus
• †Paraparchites
  • †Paraparchites circulantis
  • †Paraparchites elongatus – or unidentified comparable form
  • †Paraparchites wapanuckensis
• †Parapermopsylla – type locality for genus
  • †Parapermopsylla tricubita – type locality for species
• †Parapostibulla
  • †Parapostibulla graysoni – type locality for species
• †Paraprisca
  • †Paraprisca fragilis
• †Pararchaeocrinus
  • †Pararchaeocrinus decoratus
• †Parasaccites
  • †Parasaccites korbaenis
• †Paraschmidtella
• †Parastrophinella
  • †Parastrophinella lepida
• †Parazophocrinus
  • †Parazophocrinus callosus
• †Parelmoa – type locality for genus
  • †Parelmoa obtusa – type locality for species
  • †Parelmoa radialis – type locality for species
  • †Parelmoa revelata – type locality for species
• †Parulrichia
  • †Parulrichia haragenensis
• †Pasawioops – type locality for genus
  • †Pasawioops mayi – type locality for species
• †Passalocrinus
• †Paucicrura
  • †Paucicrura oklahomensis
  • †Paucicrura rogata – or unidentified comparable form
• †Paurorthis
  • †Paurorthis macrodeltoidea

• 

  Fossils of the Late Devonian-Permian fern-like fronds Pecopteris

  †Pecopteris
  • †Pecopteris cyathea
  • †Pecopteris geinitzi
  • †Pecopteris hemitelioides
  • †Pecopteris miltonii
  • †Pecopteris plumosa-dentata – informal
  • †Pecopteris sarefolia
• †Pelidocrinus
  • †Pelidocrinus exiguus
• †Peltabellia
  • †Peltabellia implexa
• †Peltacrinus
  • †Peltacrinus sculptatus
• †Penicillicrinus
• †Penniretepora
  • †Penniretepora ardmorensis – type locality for species
• †Pennsylvanioxylon
• †Pentameroides

• 

  Fossilized theca of the Carboniferous blastoid echinoderm ("sea bud") Pentremites

  †Pentremites
• †Periglyptocrinus
  • †Periglyptocrinus priscus
• †Perimestocrinus
  • †Perimestocrinus teneris
• †Peripetoceras
• †Permoberotha
  • †Permoberotha villosa – tentative report
• †Permoblattina
  • †Permoblattina curta
• †Permocoleus – type locality for genus
  • †Permocoleus wellingtonensis – type locality for species
• †Permopanorpa
  • †Permopanorpa inaequalis
• †Permophorus
  • †Permophorus albequus
  • †Permophorus immaturis
  • †Permophorus mexicanus
• †Permopsylla
  • †Permopsylla americana – tentative report
• †Perrinites
  • †Perrinites hilli
• †Perryella – type locality for genus
  • †Perryella olsoni – type locality for species

• 

  Fossilized tooth of the Carboniferous-Permian shark Petalodus

  †Petalodus
• †Petigurus
  • †Petigurus cullisoni
• †Petraia – tentative report
• †Petraster
• †Petrocrania
  • †Petrocrania inflata
• †Phacellopegma
  • †Phacellopegma schizoderma
• †Phacelocrinus
  • †Phacelocrinus brevis – type locality for species
  • †Phacelocrinus rosei
• †Phanassymetria
  • †Phanassymetria quadrupla
  • †Phanassymetria triserrata
• †Phanelactis
• †Phaneroneura – type locality for genus
  • †Phaneroneura martynovae – type locality for species
  • †Phaneroneura reducta – type locality for species
• †Phanocrinus
  • †Phanocrinus alexanderi – type locality for species
• †Pharkidonotus
  • †Pharkidonotus percarinatus
• †Phenopterum
  • †Phenopterum elongatum
• †Phestia
  • †Phestia inflata
• †Philhedra
• †Phillipsia – tentative report
• †Phimocrinus
• †Pholidocidaris – tentative report
  • †Pholidocidaris irregularis – or unidentified comparable form
• †Phragmodus
  • †Phragmodus inflexus
  • †Phragmodus undatus
• †Phragmolites
• †Phricodothyris
• †Phyloblatta
  • †Phyloblatta curvata
• †Phymatopleura
  • †Phymatopleura heteropleura – type locality for species
  • †Phymatopleura nodosa
• †Pidelocrinus
  • †Pidelocrinus planus
• †Pilosisporites
  • †Pilosisporites aculeolatus
  • †Pilosisporites williamsii

• 

  Light micrograph of a Pinnularia alga

  †Pinnularia
• †Pirocystella
• †Pisocrinus
  • †Pisocrinus quinquelobus
  • †Pisocrinus spatulatus
  • †Pisocrinus spatulus
  • †Pisocrinus tennesseensis
• †Pityosporites
  • †Pityosporites westphalensis
• †Placotriplesia
  • †Placotriplesia praecipta

• 

  Fossilized shell of the Ordovician brachiopod Plaesiomys

  †Plaesiomys
  • †Plaesiomys bellistriatus
  • †Plaesiomys proavitus
  • †Plaesiomys subquadrata
• †Plagioglypta
  • †Plagioglypta annulostriatum
• †Planisporites
• †Planobola
  • †Planobola macrogota
• †Platyceras
  • †Platyceras subelegans

• 

  Three fossilized calyces of the Devonian-Permian crinoid ("sea lily") Platycrinites

  †Platycrinites
• †Platycystites
  • †Platycystites bassleri
  • †Platycystites bromidensis
  • †Platycystites faberi
  • †Platycystites fimbriatus
  • †Platycystites infundus
  • †Platycystites levatus
• †Platyfundocrinus
  • †Platyfundocrinus webbersensis – type locality for species
• †Platymena – tentative report
  • †Platymena bellatula
• †Platyrhomboides
  • †Platyrhomboides quadratus
• †Platysaccus
  • †Platysaccus papilionis
  • †Platysaccus saarensis

• 

  Life restoration of the Carboniferous-Permian bony fish Platysomus

  †Platysomus
  • †Platysomus palmaris – or unidentified comparable form
• †Platystrophia
  • †Platystrophia prima
  • †Platystrophia sutherlandi
  • †Platystrophia uncinata
• †Plectambonites
  • †Plectambonites sericeus
• †Plectodonta
  • †Plectodonta petila
• †Plectoglossa
  • †Plectoglossa oklahomensis
• †Plectorthis
  • †Plectorthis punctata
  • †Plectorthis symmetrica
• †Pleuracanthus
  • †Pleuracanthus gracilis

• 

  Fossil of the Late Ordovician cystoid echinoderm Pleurocystites

  †Pleurocystites
  • †Pleurocystites watkinsi
• †Plicochonetes
• †Pliomerops
  • †Pliomerops canadensis – or unidentified comparable form
• †Pluchratia
• †Plummericrinus
  • †Plummericrinus expansus – type locality for species
• †Poikilofusa
  • †Poikilofusa plethysticha
• †Polidevcia
  • †Polidevcia bellistriata
  • †Polidevcia vaseyana – or unidentified comparable form
• †Poloniella
  • †Poloniella chaleurensis – or unidentified comparable form
• †Polyancistrodorus
  • †Polyancistrodorus columbariferus
• †Polycaulodus
  • †Polycaulodus bidentatus
  • †Polycaulodus tridentatus
• †Polycladiopora
  • †Polycladiopora pinnata – or unidentified comparable form
• †Polydeltoideus
  • †Polydeltoideus enodatus
• †Polygnathodella – type locality for genus
  • †Polygnathodella ouachitensis – type locality for species
• †Polygnathoides
  • †Polygnathoides siluricus
• †Polygnathus
  • †Polygnathus wapanuckensis – type locality for species
• †Polylophothylax
  • †Polylophothylax crossii
• †Polyplacognathus
  • †Polyplacognathus sweeti
• †Polypora
  • †Polypora debilis – type locality for species
  • †Polypora ovicellata – type locality for species
• †Polytylites
  • †Polytylites coryelli – type locality for species
  • †Polytylites kellettae – type locality for species
  • †Polytylites levinsoni – type locality for species
• †Porocrinus
  • †Porocrinus bromidensis
• †Postibulla
  • †Postibulla westergaardi – type locality for species
• †Poteriocrinus – tentative report
• †Potonieisporites
  • †Potonieisporites simplex – type locality for species
• †Praecursoricrinus
  • †Praecursoricrinus sulphurensis
• †Praepleurocystis
  • †Praepleurocystis watkinsi
• †Prasopora
  • †Prasopora fritzae
• †Primitiella
  • †Primitiella varicata
• †Primitiopsis
  • †Primitiopsis bassleri
  • †Primitiopsis elegans
  • †Primitiopsis excavatus
  • †Primitiopsis minutus
• †Prioniodus
  • †Prioniodus altodus – type locality for species
  • †Prioniodus gerdae
• †Prismopora
• †Proallosocrinus
  • †Proallosocrinus exemptus – type locality for species
  • †Proallosocrinus glenisteri – type locality for species
• †Probnis
  • †Probnis speciosa
• †Probolichas
• †Prodentalium
• †Productella
  • †Productella recensis – type locality for species
• †Productus
  • †Productus parvus
  • †Productus stehlii – type locality for species

• 

  Restoration of the Silurian trilobite Proetus

  †Proetus
  • †Proetus foculus
• †Progoneura
  • †Progoneura grimaldii – type locality for species
  • †Progoneura nobilis – type locality for species
  • †Progoneura venula – type locality for species
• †Prokopicrinus
  • †Prokopicrinus laevis
  • †Prokopicrinus tuberculatus
• †Promopalaeaster
• †Proshumardites
• †Protencrinus
  • †Protencrinus atoka – type locality for species
• †Protereisma
  • †Protereisma arcuatum – or unidentified comparable form
  • †Protereisma latum
• †Prothalassoceras
  • †Prothalassoceras inexpectans – type locality for species
• †Prothyris
  • †Prothyris soleniformis – type locality for species
• †Protocaptorhinus
  • †Protocaptorhinus pricei
• †Protohaploxypinus
  • †Protohaploxypinus duivenii
  • †Protohaploxypinus rugosus
  • †Protohaploxypinus samoilovichii
  • †Protohaploxypinus suchonensis – or unidentified comparable form
• †Protohymen
  • †Protohymen anomalus – type locality for species
  • †Protohymen bifurcatus – type locality for species
  • †Protohymen curvatus – type locality for species
  • †Protohymen largus – type locality for species
  • †Protohymen latus – type locality for species
  • †Protohymen pictus – type locality for species
  • †Protohymen readi
  • †Protohymen shafferi – type locality for species
  • †Protohymen venustus – type locality for species
• †Protozyga
  • †Protozyga loeblichi
• †Prouddenites
  • †Prouddenites primus
• †Pseodorthoceras
• †Pseudelmoa – type locality for genus
  • †Pseudelmoa ampla – type locality for species
• †Pseudoconocardium
• †Pseudocryptophyllum – or unidentified comparable form
• †Pseudodielasma
  • †Pseudodielasma perplexa
• †Pseudoiasvia – type locality for genus
  • †Pseudoiasvia sinuosa – type locality for species
• †Pseudolingula
  • †Pseudolingula elegantula – or unidentified comparable form
  • †Pseudolingula imperfecta
• †Pseudomera
  • †Pseudomera barrandei
• †Pseudomonotis – tentative report
• †Pseudomulceodens
  • †Pseudomulceodens cancellatus – or unidentified related form
• †Pseudoolenoides
  • †Pseudoolenoides acicaudus
  • †Pseudoolenoides carterensis – type locality for species
  • †Pseudoolenoides derbyi – type locality for species
• †Pseudooneotodus
  • †Pseudooneotodus bicornis
  • †Pseudooneotodus linguicornis
• †Pseudoparalegoceras
  • †Pseudoparalegoceras brazoense
• †Pseudopronorites
  • †Pseudopronorites arkansasense
  • †Pseudopronorites quinni
• †Pseudorthoceras
  • †Pseudorthoceras knoxense
• †Pseudosyrinx
  • †Pseudosyrinx missouriensis – or unidentified comparable form
• †Pseudothoceras
• †Pseudozygopleura
  • †Pseudozygopleura multicostata – tentative report
  • †Pseudozygopleura peoriense
  • †Pseudozygopleura plebium – tentative report
  • †Pseudozygopleura scitula
• †Psilokirkbyella
  • †Psilokirkbyella magnopuncata
• †Psophosphaera
  • †Psophosphaera greeri
• †Pteroconus – tentative report
  • †Pteroconus abbreviatus
• †Pteronites
  • †Pteronites angustatus – or unidentified comparable form
• †Pterotocrinus – tentative report
  • †Pterotocrinus springerensis – type locality for species
• †Ptychocladia
  • †Ptychocladia bassleri
• †Ptychopleurella
  • †Ptychopleurella rugiplicata
• †Pudoproetus
  • †Pudoproetus chappelensis
• †Pulchratia
• †Pulchrilamina
  • †Pulchrilamina spinosa
• †Punctaparchites
  • †Punctaparchites rugosus
• †Punctatisporites
  • †Punctatisporites flavus
  • †Punctatisporites glaber
  • †Punctatisporites minutus
• †Punctatosporites
  • †Punctatosporites minutus
• †Punctospirifer
  • †Punctospirifer kentuckensis
  • †Punctospirifer subtexta
  • †Punctospirifer transversa
• †Punctothyris
  • †Punctothyris kenwoodensis
• †Punka
  • †Punka akoura
  • †Punka verecunda
• †Pustula
  • †Pustula kenwoodensis – type locality for species
  • †Pustula oklahomae – type locality for species
• †Pycnopora
  • †Pycnopora ovatipora – type locality for species
• †Pygmaeocrinus
• †Pyrgocystis

Q

• †Quadrocystis
  • †Quadrocystis graffhami

R

• †Raaschia – type locality for genus
  • †Raaschia oklahomensis – type locality for species
• †Rafinesquina
• †Raistrickia
  • †Raistrickia abdita
  • †Raistrickia aculeata
  • †Raistrickia aculeolata
  • †Raistrickia breveinens
  • †Raistrickia crinita
  • †Raistrickia crocea
• †Rakverella – tentative report
• †Ranapeltis
  • †Ranapeltis rowlandi – type locality for species
• †Ranasasus
  • †Ranasasus brevicephalus
  • †Ranasasus colossus
  • †Ranasasus conicus
• †Randaynia
  • †Randaynia leatherburyi
• †Raphistoma
• †Rayella
  • †Rayella calvini
  • †Rayella parva
• †Raymondites
• †Rayonnoceras
  • †Rayonnoceras vaughanianum – type locality for species
• †Rectifenestella
  • †Rectifenestella tenax
• †Redstonia
  • †Redstonia cooperi
• †Reedops
  • †Reedops deckeri
• †Regulaecystis
• †Remopleurides
• †Renalcis
• †Renaultia
• †Rensselaerina
  • †Rensselaerina haraganana
• Reophax
  • †Reophax oacuhitensis – type locality for species
• †Resserella
  • †Resserella brownsportensis
• †Reteocrinus
  • †Reteocrinus depressus – type locality for species
• †Reticestus – tentative report
  • †Reticestus retiferus
• †Reticulaiina
• †Reticulariina
• †Reticulatisporites
  • †Reticulatisporites reticulatus
• †Reticulopteris
  • †Reticulopteris muensteri
• †Retispira
  • †Retispira meekiana
  • †Retispira reticulata – type locality for species
• †Rhabdomeson
  • †Rhabdomeson foerstei – type locality for species
  • †Rhabdomeson rogersi – type locality for species
  • †Rhabdomeson ulrichi – type locality for species
• †Rhipidomella
  • †Rhipidomella acutisulcata – type locality for species
  • †Rhipidomella diminutiva
  • †Rhipidomella henryhousensis – type locality for species
  • †Rhipidomella oklahomensis – type locality for species
  • †Rhipidomella subtriangularis – type locality for species
• †Rhipidomelloides
  • †Rhipidomelloides oblata
• †Rhiptosocherma
  • †Rhiptosocherma improcera
• †Rhizomaspora – type locality for genus
  • †Rhizomaspora divaricata – type locality for species
  • †Rhizomaspora lemniscata – type locality for species
  • †Rhizomaspora radiata – type locality for species
• †Rhizomospora
• †Rhizophyllum
• †Rhombocladia
• †Rhombopora
  • †Rhombopora johnsvalleyensis – type locality for species
  • †Rhombopora nitidula – type locality for species
• †Rhopalia
  • †Rhopalia catenata

• 

  Life restoration of the Permian amphibian Rhynchonkos

  †Rhynchonkos
  • †Rhynchonkos stovalli – type locality for species
• †Rhynchopora
  • †Rhynchopora kollari – type locality for species
  • †Rhynchopora persinuata
• †Rhynchospirina
  • †Rhynchospirina maxwelli – type locality for species
• †Rhynchotrema
  • †Rhynchotrema increbescens – tentative report
• †Richardsonites
  • †Richardsonites richardsonianus – type locality for species
• †Rishona

• 

  Fossil of the barnacle boring ichnogenus Rogerella

  Rogerella
• †Rollia
  • †Rollia goodwini
• Rostricellula
  • †Rostricellula cuneata
• †Rothella
  • †Rothella haraganensis – type locality for species
  • †Rothella obliqua
  • †Rothella recta
• †Rothianiscus
  • †Rothianiscus robusta – type locality for species
• †Roundyella
  • †Roundyella bellatula
• †Rowleyella
  • †Rowleyella fabulites
• †Rugosochinetes
• †Rugosochonetes
  • †Rugosochonetes multicostus

S

• †Saccocrinus
  • †Saccocrinus benedicti
• †Saffordotaxis
• †Sagenodus
  • †Sagenodus vinslovi
• †Sandia
• †Sanguinolites
  • †Sanguinolites omalianus
  • †Sanguinolites raleighensis
  • †Sanguinolites simulans
• †Sansabella
  • †Sansabella keslingi – type locality for species
  • †Sansabella truncata – or unidentified comparable form
• †Sansabelloides
• †Sargentina
  • †Sargentina allani – or unidentified comparable form
• †Saucrophyllum
• †Scaphiocrinus – tentative report
• †Schellwienella
  • †Schellwienella marcidula
• †Schistoceras
  • †Schistoceras unicum – type locality for species
• †Schizambon
  • †Schizambon perspinosum
• †Schizodus
  • †Schizodus chesterensis
  • †Schizodus ovatus
  • †Schizodus texanus
• †Schizonema
  • †Schizonema hami
• †Schizophoria
  • †Schizophoria mayesensis – type locality for species
• †Schmidtella
  • †Schmidtella affinis
  • †Schmidtella asymmetrica
  • †Schmidtella brevis
  • †Schmidtella crassimarginata
  • †Schmidtella excavata
  • †Schmidtella minuta
  • †Schmidtella ovalis
  • †Schmidtella transversa
• †Schopfipollenites
  • †Schopfipollenites signatus – type locality for species
• †Schuchertella
  • †Schuchertella attentuata
  • †Schuchertella haraganensis
• †Sciadiocrinus
  • †Sciadiocrinus cascus – type locality for species
  • †Sciadiocrinus crassacanthus
  • †Sciadiocrinus planulatus
• †Scolecia
  • †Scolecia filosa
• †Scolecopteris
  • †Scolecopteris altissima
  • †Scolecopteris gnoma
• †scolerodont
• †Scolopodus
  • †Scolopodus oklahomensis – type locality for species
  • †Scolopodus striatum – type locality for species
• †Scutepustula
  • †Scutepustula arctifossa
• †Scyphocrinites

• 

  Fossilized calyx of the Carboniferous crinoid ("sea lily") Scytalocrinus

  †Scytalocrinus
  • †Scytalocrinus crassibrachiatus – type locality for species
  • †Scytalocrinus sansabensis
• †Sedgwickia
  • †Sedgwickia rugosa – type locality for species
• †Seminolites
  • †Seminolites kosomensis – type locality for species
  • †Seminolites perforatus – type locality for species
  • †Seminolites pushmatahensis – type locality for species
• †Seminolithes
  • †Seminolithes clarkei – type locality for species
• †Senftenbergia
• †Septimyalina
  • †Septimyalina burmai
• †Septopora

• 

  Fossilized skeleton of the Permian primitive four-limbed animal Seymouria

  †Seymouria
  • †Seymouria baylorensis
• †Shaleria – tentative report
• †Shansiella
  • †Shansiella carbonaria – tentative report
• †Shumardoceras
• †Sibyrhynchus
• †Sieberella
  • †Sieberella roemeri
• †Sievertsia

• 

  Fossilized stump of the Carboniferous-Permian club moss relative Sigillaria

  †Sigillaria
• †Sigmophlebia – type locality for genus
  • †Sigmophlebia engeli – type locality for species
• †Sillerpeton – type locality for genus
  • †Sillerpeton permianum – type locality for species
• †Sinclairocystis
  • †Sinclairocystis angulatus
  • †Sinclairocystis praedicta
  • †Sinclairocystis sulphurensis
• †Sinuitina
  • †Sinuitina cordiformis – type locality for species
• †Sinuopea
  • †Sinuopea basiplanata
  • †Sinuopea vera
• †Siphonocrinus
  • †Siphonocrinus dignus
• †Skenidioides
  • †Skenidioides henryhousensis
  • †Skenidioides oklahomensis
  • †Skenidioides perfectus
• †Skenidium
  • †Skenidium insigne

• 

  Fossilized shells of the marine bivalve Solecurtus

  Solecurtus
  • †Solecurtus gardneri – type locality for species
• Solemya – report made of unidentified related form or using admittedly obsolete nomenclature
• †Soleniscus
  • †Soleniscus primigenia
  • †Soleniscus regularis
• †Solenochilus
• †Solenomorpha – tentative report
  • †Solenomorpha nitida – or unidentified comparable form
• †Somoholites
• †Sowerbyella
  • †Sowerbyella indistincta
  • †Sowerbyella plicatifera
  • †Sowerbyella variabilis
  • †Sowerbyella vulgata
• †Sowerbyites
  • †Sowerbyites hami
  • †Sowerbyites lamellosus
• †Spaniocrinus
• †Speyeris
  • †Speyeris hami

• 

  Fossil of the Middle Ordovician-Silurian trilobite Sphaerexochus

  †Sphaerexochus
  • †Sphaerexochus glaber
• †Sphaerirhynchia
  • †Sphaerirhynchia glomerosa – type locality for species
  • †Sphaerirhynchia lindenensis
• †Sphaerocoryphe
• †Sphaerodoma
  • †Sphaerodoma gracilis
• †Sphaerolepis
  • †Sphaerolepis arctata

• 

  Fossilized leaves and branches of the Devonian-Triassic horsetail relative Sphenophyllum

  †Sphenophyllum
  • †Sphenophyllum emarginatum
  • †Sphenophyllum gilmorei
  • †Sphenophyllum latifolium – or unidentified comparable form
  • †Sphenophyllum obovatum
  • †Sphenophyllum stoukenbergi – tentative report
• †Sphenopteris
  • †Sphenopteris macilenta
• †Spinobairdia
• †Spinocarinifera
  • †Spinocarinifera semicostata
• †Spinosporites
  • †Spinosporites exiguus

• 

  Fossilized shell of the Late Ordovician-Late Triassic brachiopod Spirifer

  †Spirifer
  • †Spirifer casteri – type locality for species
  • †Spirifer grimesi
  • †Spirifer opimus
• †Spiriferellina
• †Spirillina
  • †Spirillina bendensis – type locality for species
• Spirorbis
  • †Spirorbis elegans – type locality for species
• †Spongophylloides
• †Squamularia
• †Stacheia
  • †Stacheia congesta
• †Staffella
• †Stegerhynchus
  • †Stegerhynchus carmelensis
  • †Stegerhynchus clairensis
  • †Stegerhynchus concinna
• †Stegnopsis
  • †Stegnopsis erythragora – type locality for species
  • †Stegnopsis wellingensis – type locality for species
• †Stegocoelia
• †Stellarocrinus
  • †Stellarocrinus cuneatus
• †Stenocladia – tentative report
  • †Stenocladia bassleri
• †Stenopecrinus
  • †Stenopecrinus ornatus – type locality for species
• †Stenopora
• †Stephanozyga
• †Steptognathodus
• †Stereobrachicrinus – type locality for genus
  • †Stereobrachicrinus pustullosus – type locality for species
• †Stereostylus
  • †Stereostylus perversus
• †Stictopora
  • †Stictopora fenestrata
• †Strabocystis – type locality for genus
  • †Strabocystis fayi – type locality for species
• †Straparollus
• †Straparolous
  • †Straparolous catilloides
  • †Straparolous catiloides
• †Streblochondria – tentative report
  • †Streblochondria tenuilineata
• †Strebloplax – type locality for genus
  • †Strebloplax crustacea – type locality for species
• †Streblotrypa
  • †Streblotrypa nicklesi
• †Streptognathodus
• †Streptorhynchus
• †Striatites
  • †Striatites richteri
• †Striatopodocarpites
  • †Striatopodocarpites caricicostatus
  • †Striatopodocarpites communis
  • †Striatopodocarpites olsonii
• †Strigigenalis
  • †Strigigenalis caudata
  • †Strigigenalis crassimarginata
  • †Strigigenalis derbyi
  • †Strigigenalis implexa
  • †Strigigenalis insentis
  • †Strigigenalis knighti – or unidentified comparable form
• †Strimplecystis – type locality for genus
  • †Strimplecystis oklahomensis – type locality for species
• †Strixella
  • †Strixella acutisulcata
• †Strobeus
  • †Strobeus brevis
  • †Strobeus gouldiana – type locality for species
  • †Strobeus intercalaris
  • †Strobeus paludinaeformis
• †Stroboceras
  • †Stroboceras furnishi – type locality for species
• †Stromatotrypa
  • †Stromatotrypa frondosa
• †Strongylocrinus
  • †Strongylocrinus hansoni – type locality for species
  • †Strongylocrinus ornatus – type locality for species
• †Strophochonetes

• 

  Fossilized shell of the Ordovician-Silurian brachiopod Strophomena

  †Strophomena
  • †Strophomena clermontensis
  • †Strophomena costellata
  • †Strophomena crinerensis
  • †Strophomena neglecta
  • †Strophomena oklahomensis
  • †Strophomena perconcava – or unidentified comparable form
  • †Strophomena planumbona
  • †Strophomena trentonensis
• †Strophonella
  • †Strophonella alterniradiata
  • †Strophonella bransoni – type locality for species
  • †Strophonella laxiplicata
  • †Strophonella loeblichi
  • †Strophonella prolongata
• †Strophostylus
• †Strotersporites – type locality for genus
  • †Strotersporites communis – type locality for species
• †Stylocrinus
• †Sulcatisporites
  • †Sulcatisporites potoniei
• †Sylvohymen
  • †Sylvohymen ingens – type locality for species
• †Synchirocrinus
  • †Synchirocrinus divisus
  • †Synchirocrinus quadratus
• †Synerocrinus
  • †Synerocrinus farishi
• †Syngastrioceras
  • †Syngastrioceras clinei – type locality for species
  • †Syngastrioceras scotti
• †Syringaxon

T

• †Tabulipora
  • †Tabulipora macnairi – type locality for species
  • †Tabulipora simplex – type locality for species
  • †Tabulipora tuberculata – or unidentified comparable form
• †Taeniaesporites
  • †Taeniaesporites noviaulensis – or unidentified comparable form
• †Taeniopteris
  • †Taeniopteris abnormis
  • †Taeniopteris multinervis
• †Tainoceras
  • †Tainoceras murrayi
• †Tanaocystis
  • †Tanaocystis watkinsi
• †Tarphyceras
  • †Tarphyceras chadwickense
• †Teguliferina
  • †Teguliferina parva – type locality for species
• †Tegulocrea
  • †Tegulocrea incerta
• †Teiichispira
  • †Teiichispira affinis – or unidentified comparable form
• †Tellinomorpha
  • †Tellinomorpha schencki – type locality for species

• 

  Fossilized shell of the Early Ordovician-Late Devonian probable mollusc Tentaculites

  †Tentaculites
• †Terpnocrinus
• †Tersomius
  • †Tersomius dolesensis – type locality for species
  • †Tersomius mosesi – type locality for species
  • †Tersomius texensis – or unidentified comparable form
• †Tetradellina
  • †Tetradellina henningsmoeni
• †Tetrataxis
  • †Tetrataxis decurrens – or unidentified comparable form
  • †Tetrataxis lata

• 

  Fossilized shell of the Carboniferous-modern foraminiferan Textularia

  Textularia
  • †Textularia grahamensis – or unidentified comparable form
• †Thalamocrinus
  • †Thalamocrinus elongatus
• †Thalattocanthus
  • †Thalattocanthus consonus
• †Thaleops
  • †Thaleops jaanussoni
• †Thallograptus
• †Thamniscus
  • †Thamniscus erectus – type locality for species
• †Thigriffides
  • †Thigriffides roundyi
• †Thlipsura
  • †Thlipsura furca
• †Thlipsurella
  • †Thlipsurella fossata
  • †Thlipsurella muricurva
  • †Thlipsurella murrayensis – type locality for species
  • †Thlipsurella putea
• †Thlipsuroides
• †Thomasatia
  • †Thomasatia auricula
• †Thomasatina
  • †Thomasatina bromidensis
  • †Thomasatina simplex
• †Thoracoceras
• †Thrausmosaurus – type locality for genus
  • †Thrausmosaurus serratidens – type locality for species
• †Thuroholia
  • †Thuroholia crinerensis
  • †Thuroholia croneisi
  • †Thuroholia overbrookensis
• †Thymnospora
  • †Thymnospora pseudothiessenii – or unidentified comparable form
• †Thymospora
  • †Thymospora pseudothiessenii
• †Tolypammina
• †Torispora
  • †Torispora securis
• †Torynifer
• †Trematospira
  • †Trematospira costata – or unidentified comparable form
  • †Trematospira hippolyte – or unidentified comparable form
• †Trepospira
  • †Trepospira depressa
• †Trigonirhynchia
  • †Trigonirhynchia acutirostella

• 

  Fossilized skull of the Permian amphibian Trimerorhachis

  †Trimerorhachis
  • †Trimerorhachis insignis
• †Triquitrites
  • †Triquitrites additus
  • †Triquitrites bransonii
  • †Triquitrites exiguus
  • †Triquitrites sculptilis
  • †Triquitrites spinosus
  • †Triquitrites subspinosus
  • †Triquitrites tribullatus
• †Tririctus – type locality for genus
  • †Tririctus reticulatus – type locality for species
• †Tritonoceras
• †Trochonodella
  • †Trochonodella obtusa
• †Trochosporites – type locality for genus
  • †Trochosporites reniformis – type locality for species
• †Trucherognathus
  • †Trucherognathus distorta
  • †Trucherognathus irregularis
• †Tryplasma
• †Tuberculatosporites
  • †Tuberculatosporites robustus
• †Tubulibairdia
  • †Tubulibairdia simplex
• †Tupus
  • †Tupus gracilis – type locality for species
• †Turgidacystis – type locality for genus
  • †Turgidacystis graffhami – type locality for species
• †Turrilepas
  • †Turrilepas whithersi – type locality for species

U

• †Ulocrinus
• †Ulrichia
• †Ulrichidiscus
  • †Ulrichidiscus forbesi – type locality for species
• †Unibothriocidaris

• 

  Fossil of the Ordovician-Devonian sea star Urasterella

  †Urasterella
• †Utharocrinus
  • †Utharocrinus pentanodus

V

• †Valcourea
  • †Valcourea transversa

• 

  Varanodon

  †Varanodon – type locality for genus
  • †Varanodon agilis – type locality for species
• †Varanops
  • †Varanops brevirostris – or unidentified comparable form
• †Veliberychia
• †Vermiporella – tentative report
• †Verrucosisporites
  • †Verrucosisporites grandiverrucosus
  • †Verrucosisporites microtuberosus
  • †Verrucosisporites verrucosus – or unidentified comparable form
• †Veryhachium
  • †Veryhachium bromidense
  • †Veryhachium irroratum
• †Vesicaspora
  • †Vesicaspora schemelii
  • †Vesicaspora wilsonii
• †Vestispora
  • †Vestispora fenestrata
  • †Vestispora foveata
  • †Vestispora pseudoreticulata
  • †Vestispora wanlessii
• †Victoriacystis
  • †Victoriacystis holmesorum – or unidentified related form
• †Villosacapsula
  • †Villosacapsula entriche
• †Vinella
  • †Vinella bilineata – type locality for species
• †Virginiata
  • †Virginiata arkansana
• †Vittatina
  • †Vittatina costabilis – type locality for species
  • †Vittatina lata – type locality for species
  • †Vittatina simplex
  • †Vittatina verrucosa
• †Vogdesia
  • †Vogdesia bromidensis
• †Voiseyella
  • †Voiseyella novamexicana

W

• †Waagenella
  • †Waagenella crassus – or unidentified comparable form

• 

  Fossilized foliage of the Carboniferous-Permian conifer Walchia

  †Walchia
  • †Walchia gracilis – or unidentified comparable form
  • †Walchia imbricata – tentative report
• †Walliserodus
• †Watongia – type locality for genus
  • †Watongia meieri – type locality for species
• †Wedekindellina
• †Wellerella
• †Wellergyi
  • †Wellergyi brazerianum
• †Wellerites
  • †Wellerites mohri
• †Wewokella
  • †Wewokella solida
• †Wewokites
  • †Wewokites venatus
• †Whitspakia
  • †Whitspakia schucherti
• †Wichitoceras
  • †Wichitoceras crassum
  • †Wichitoceras decipiens
• †Wiedeyoceras
• †Wilkingia
  • †Wilkingia rothi
• †Wilsonites
  • †Wilsonites delicatus
  • †Wilsonites vesicatus
• †Winchellatina
  • †Winchellatina cornuta
  • †Winchellatina longispina
• †Worthenia
  • †Worthenia tabulata
• †Wurmiella
  • †Wurmiella excavata
  • †Wurmiella posthamata

X

• 

  Restoration of the Late Devonian–Triassic freshwater shark Xenacanthus

  †Xenacanthus

Y

• †Yochelsonospira
  • †Yochelsonospira thomasi – type locality for species
• Yoldia
• †Youngiella
  • †Youngiella wapanuckensis – type locality for species

Z

• †Zaphrentites
  • †Zaphrentites arkansanus

• 

  Life restoration of the Permian amphibian Zatrachys

  †Zatrachys
  • †Zatrachys serratus
• †Zeilleria
• †Zelophyllum
• †Zenocrinus
  • †Zenocrinus zeus – type locality for species
• †Zonalasporites
  • †Zonalasporites punctaticus – type locality for species
  • †Zonalasporites punctatus
• †Zophocrinus
  • †Zophocrinus angulatus
• †Zosterosporites
  • †Zosterosporites triangularis
• †Zygopleura
• †Zygopteris
  • †Zygopteris illinoiensis

References

• Various Contributors to the Paleobiology Database. "Fossilworks: Gateway to the Paleobiology Database". Retrieved 17 December 2021.