This list of the Mesozoic life of Wyoming contains the various prehistoric life-forms whose fossilized remains have been reported from within the US state of Wyoming and are between 252.17 and 66 million years of age.
A edit
- †Abielites
Illustration of a living Acipenser sturgeon - †Acutostrea
- †Adocus
- †Agathaumas – type locality for genus
- †Agathaumas sylvestris – type locality for species
- †Agerostrea
- †Agialopous – type locality for genus
- †Agialopous wyomingensis – type locality for species
Restoration of the Cretaceous-Pleistocene amphibian Albanerpeton - †Albanerpeton galaktion
- †Albanerpeton nexuosus – type locality for species
- †Albertosaurus – or unidentified comparable form
- †Alethesaurus – type locality for genus
- †Alethesaurus quadratus – type locality for species
- †Aletridelphys
- †Aletridelphys florencae – type locality for species
- †Aletridelphys hatcheri
- †Allacodon
- †Allacodon lentus – type locality for species
- †Allacodon pumilis – type locality for species
- †Allognathosuchus
Life restoration of the Late Jurassic theropod dinosaur Allosaurus - †Allosaurus fragilis – type locality for species
- †Allosaurus jimmadseni
- †Alostera
- †Alostera saskatchewanensis – type locality for species
- †Alphadon
- †Alphadon attaragos – type locality for species
- †Alphadon halleyi
- †Alphadon marshi
- †Alphadon sahnii
- †Altacreodus
- †Alzadites
- †Alzadites westonensis – type locality for species
- †Amblotherium – type locality for genus
- †Amblotherium gracilis – type locality for species
- †Amborellites – type locality for genus
- †Amborellites wyomingensis – type locality for species
A living Amia, or bowfin - †Amphicoelias
- †Amphicoelias brontodiplodocus – type locality for species
- †Amphidon – type locality for genus
- †Amphidon superstes – type locality for species
- †Anaklinoceras
- †Anaschisma – type locality for genus
- †Anaschisma brachygnatha – type locality for species
- †Anaschisma browni – type locality for species
- †Anceptophyllum – type locality for genus
- †Anceptophyllum pulcrum – type locality for species
- †Anchura – tentative report
- †Ancorichnus
- †Andromeda
- †Anemia
Restoration of the Late Triassic phytosaur Angistorhinus - †Angistorhinus aeolamnis – type locality for species
- †Angistorhinus gracilis – type locality for species
- †Angistorhinus grandis – type locality for species
- †Angistorhinus maximus – type locality for species
- †Anisoceras
- †Anisomyon
- †Anisomyon borealis
- †Anisomyon centrale
- †Anisomyon patelliformis
- †Anisomyon subovatus – or unidentified related form
- †Anisomyon subovulatus
- †Ankistrorhynchus
- †Ankistrorhynchus washakiensis – type locality for species
Life restoration of the Late Cretaceous armored dinosaur Ankylosaurus - †Anomalofusus – tentative report
- Anomia
- Anona
- †Anona robusta – tentative report
- †Anthrotaxopsis
- Antrimpos
- †Apatodonosaurus
- †Apatosaurinae
- †Apatosaurinae – type locality for genus – informal
Life restoration of the Late Jurassic sauropod dinosaur Apatosaurus - †Apeibopsis – tentative report
- †Aploconodon – type locality for genus
- †Aploconodon comoensis – type locality for species
- Aporrhais
- †Aquilina – type locality for genus
- †Aquilina grossidentata – type locality for species
- Aralia
- †Araliaephyllum
Foliage and cones of a living Araucaria tree - †Araucarites
- †Araucarites cuneatus – type locality for species
- †Araucarites longifolia
- †Araucarites wyomingensis – type locality for species
- Arca – report made of unidentified related form or using admittedly obsolete nomenclature
- †Arcellites
- †Archaeotriakis
- †Archaeotriakis ornatus – type locality for species
- †Archaeotriakis rochelleae
- †Archaeotrigon – type locality for genus
- †Archaeotrigon brevimaxillus – type locality for species
Fossilized shells of the Middle Jurassic ammonoid cephalopod Arcticoceras - †Arenicolites
- †Aristolochites
- †Ascarinites – type locality for genus
- †Ascarinites communis – type locality for species
- Aspideretes
- †Aspideretoides
- †Aspideretoides foveatus – or unidentified comparable form
- †Asplenites
A living Asplenium, or spleenwort - †Astandes
- †Astarta
- Astarte
- †Athrotaxopsis
- † Atira – tentative report
- †Atokatheridium – or unidentified comparable form
Illustration of fossilized teeth from the Late Cretaceous tyrannosaur Aublysodon - †Austrotindaria
- †Avernalia – type locality for genus
- †Avernalia solida – type locality for species
B edit
Fossilized shell of the Late Cretaceous ammonoid cephalopod Baculites - †Baculites asper
- †Baculites asperiformis
- †Baculites baculus
- †Baculites clinolobatus
- †Baculites cobbani
- †Baculites codyensis
- †Baculites crickmayi
- †Baculites elaisi
- †Baculites eliasi
- †Baculites gilberti
- †Baculites grandis
- †Baculites gregoryensis
- †Baculites haresi
- †Baculites jenseni – or unidentified comparable form
- †Baculites mariasensis
- †Baculites mclearni
- †Baculites obtusus
- †Baculites perplexus
- †Baculites reesidei
- †Baculites rugosus
- †Baculites scotti
- †Baena
- †Baena hatcheri – type locality for species
- †Baena hayi – type locality for species
- †Baena marshi – type locality for species
- †Baieropsis
- †Baptanodon
- †Baptanodon discus
- †Baptanodon reedi – type locality for species
- †Baptanodon robustus – type locality for species
- Barbatia – tentative report
Restoration of the Late Jurassic sauropod dinosaur Barosaurus rearing to defend itself against a pair of the theropod Allosaurus - †Basilemys
- †Batodon
- †Batodon tenuis – type locality for species
- †Belonostomus
- Berenicea
- Bombur
- †Borealosuchus
- †Borealosuchus sternbergii – type locality for species
- †Boremys
- †Borissiakoceras
- Botula
A living Brachaelurus, or blind shark - †Brachaelurus bighornensis – type locality for species
- †Brachiosaurus
- †Brachybrachium – type locality for genus
- †Brachybrachium brevipes – type locality for species
- †Brachychampsa
- †Brachyphyllum
- †Brontopodus – or unidentified comparable form
Life restoration of a herd of the Late Jurassic sauropod dinosaur Brontosaurus - †Brontosaurus excelsus – type locality for species
- †Brontosaurus parvus – type locality for species
- †Brontosaurus yahnahpin – type locality for species
- †Bryceomys
- †Bullopsis
- †Bullopsis cretacea – or unidentified related form
C edit
- †Cadoceras
- Callista
- †Calycoceras
Life restoration of a herd of the Late Jurassic sauropod dinosaur Camarasaurus - †Camarasaurus grandis – type locality for species
- †Camarasaurus lentus – type locality for species
- †Camborygma
- Campeloma
- †Camptomus
- †Camptomus amplus – type locality for species
- †Camptonectes
- †Camptonectes bellistriatus
- †Camptonectes distans – or unidentified comparable form
- †Camptonectes platessiformis
- †Camptonectes stygius
Life restoration of the Late Jurassic ornithopod dinosaur Camptosaurus - †Camptosaurus dispar – type locality for species
- † Canna
- †Canna magnifolia – tentative report
- †Capillirhynchia
- †Capillirhynchia gallatinensis – type locality for species
- Cardium sp.
- †Carpites
- †Carpolithus
- †Carpolithus barrensis – type locality for species
- †Carpolithus fasciculatus
- †Carpolithus foenarius – type locality for species
- †Carpolithus montiumnigrorum – type locality for species
- †Carpolithus virginiensis
- †Carthaginites
- †Carthaginites aquilonius – type locality for species
- †Cataceramus
- †Cedrobaena
- †Celastrophyllum
Foliage and fruit of a living Celastrus, or staff vine - †Cemeterius – type locality for genus
- †Cemeterius monstrosus – type locality for species
- †Centrophoroides
- †Centrophoroides worlandensis – type locality for species
- †Cephalotaxopsis
- †Ceramornis – type locality for genus
- †Ceramornis major – type locality for species
- †Ceratodus
Restoration of the Late Jurassic ceratosaur Ceratosaurus - Cercidiphyllum
- †Cercomya
- †Ceritella
- Cerithium – tentative report
- †Chamops – type locality for genus
- †Chamops segnis – type locality for species
Life restoration of the Late Cretaceous-Eocene choristoderan reptile Champsosaurus - †Chelonipus – or unidentified comparable form
- Chiloscyllium
- †Chirotherium
- Chlamys
- †Chondroceras
- †Cimexomys
- †Cimolestes
- †Cimolestes incisus – type locality for species
- †Cimolestes stirtoni – type locality for species
- †Cimolodon
- †Cimolodon nitidus – type locality for species
- †Cimolodon peregrinus – type locality for species
Life restoration of the face of the Late Cretaceous multituberculate mammal Cimolomys - †Cimolomys clarki
- †Cimolomys gracilis – type locality for species
- †Cimolomys parvus – type locality for species
- †Cimolopteryx
- †Cimolopteryx maxima – type locality for species
- †Cimolopteryx rara
- Cinnamomum
- †Cissitis
- Cissus
- †Cissus lobato-crenata – tentative report
- †Cladoceramus
- †Cladoceramus undulatoplicatus – or unidentified related form
Fossilized foliage of the Permian-Late Cretaceous fern Cladophlebis - †Cladophlebis parva
- †Cladophlebis readi – type locality for species
- †Cladophlebis readii
- †Cladophlebis wyomingensis – type locality for species
- †Claraia
- †Clemensodon – type locality for genus
- †Clemensodon megaloba – type locality for species
- †Clioscaphites
- †Coahuilites
- †Coelostylina
- †Coelosuchus – type locality for genus
- †Coelosuchus reedii – type locality for species
Diagram illustrating the known fossil material of the Late Jurassic theropod dinosaur Coelurus - †Coelurus fragilis – type locality for species
- †Collignoniceras
- †Colpodontosaurus – type locality for genus
- †Colpodontosaurus cracens – type locality for species
- †Comobatrachus – type locality for genus
- †Comobatrachus aenigmaticus – type locality for species
- †Comodactylus – type locality for genus
- †Comodactylus ostromi – type locality for species
- †Comodon – type locality for genus
- †Comodon gidleyi – type locality for species
- †Comonecturoides – type locality for genus
- †Comonecturoides marshi – type locality for species
- †Comotherium – type locality for genus
- †Comotherium richi – type locality for species
- †Compsemys
- †Confusionella
- †Confusionella loczyi – type locality for species
Illustration of fossilized vertebrae of the Late Cretaceous-Eocene snake Coniophis. Othniel Charles Marsh (1892). - †Coniophis precedens – type locality for species
- †Coniopteris – tentative report
- †Contogenys – or unidentified comparable form
- †Corax
- †Corbicella – tentative report
- Corbula
- †Coriops
- †Cornophyllum
Life restoration of the Early Triassic plesiosaur relative Corosaurus - Cossmannea
- Crassatella
- †Crassidenticulum
- †Crassidenticulum aquilae – type locality for species
- †Crassidenticulum decurrens
- Crenella
- †Cretorectolobus
- †Cryptometoicoceras – type locality for genus
- †Cryptometoicoceras mite – type locality for species
- †Cryptorhytis
- †Ctenacodon – type locality for genus
- †Ctenacodon laticeps – type locality for species
- †Ctenacodon scindens – type locality for species
- †Ctenacodon serratus – type locality for species
- †Cteniogenys – type locality for genus
- †Cteniogenys antiquus – type locality for species
- †Ctenostreon
- †Ctenostreon gikshanensis – or unidentified comparable form
Shell of a Cucullaea, or false ark shell - †Cunningtoniceras
- Cuspidaria
- †Cycadeospermum
- †Cyclurus
- †Cylindricum
- †Cymbophora
- †Cymbophora canonensis – or unidentified comparable form
- †Cymbophora formosa
- †Cymbophora holmesi
- †Cyperacites
- †Czekanowskia
D edit
- †Dakotasaurus – type locality for genus
- †Dakotasaurus browni – type locality for species
- †Daspletosaurus
Life restoration of the Early Cretaceous dromaeosaur ("raptor") Deinonychus - †Delphodon
- †Delphodon comptus – type locality for species
- †Deltatheroides – or unidentified comparable form
- †Dennstaedtia
- Dentalium
- †Derrisemys
Restoration of the Late Triassic aetosaur Desmatosuchus with an anachronistic human to scale - †Desmoscaphites
- †Dewalquea
- †Diastopora
- †Diastopora cutleri – type locality for species
- †Dicellonema
- †Dicotyledon
Life restoration of the Late Cretaceous marsupial relative Didelphodon - †Didelphodon vorax – type locality for species
- †Didymoceras
- †Dillenites
- †Dinochelys
- †Diospyros
- †Diploconcha
- †Diplocraterion
- †Diplodocinae
- †Diplodocinae – type locality for genus – informal
Life restoration of the Late Jurassic long-necked dinosaur Diplodocus - †Diplodocus carnegii – type locality for species
- †Diplodocus hallorum
- †Diplodocus longus
- †Discoscaphites
- †Docodon – type locality for genus
- †Docodon affinis – type locality for species
- †Docodon crassus – type locality for species
- †Docodon striatus – type locality for species
- †Docodon superus – type locality for species
- †Docodon victor – type locality for species
- †Dolichobrachium – type locality for genus
- †Dolichobrachium gracile – type locality for species
Mounted fossilized skeleton of the Late Cretaceous plesiosaur Dolichorhynchops - †Dombeyopsis
- †Doratodon – tentative report
- †Dorsetisaurus
- †Dosiniopsis
- †Drepanocheilus
- †Drepanocheilus evansi
- †Drepanocheilus nebrascensis
- †Drepanocheilus obesus
- †Drepanocheilus scotti – or unidentified comparable form
- †Drinker – type locality for genus
- †Drinker nisti – type locality for species
Life restoration of the Late Cretaceous "raptor" Dromaeosaurus - †Dryandroides
- †Dryolestes – type locality for genus
- †Dryolestes priscus – type locality for species
- †Dryolestes vorax
- †Dryophyllum – type locality for genus
- †Dryophyllum lanceolatum
- †Dryophyllum polymorphum – type locality for species
- †Dryophyllum subfalcatum
- Dryopteris
- †Dryosaurus
- †Dryosaurus altus – type locality for species
- †Dryptosaurus – or unidentified comparable form
- †Dunveganoceras
- †Dyslocosaurus – type locality for genus
- †Dyslocosaurus polyonychius – type locality for species
E edit
- †Echidnocephalus – tentative report
- †Edmontonia
- †Edmontonia rugosidens – or unidentified comparable form
- †Edmontosaurus
Life restoration of the Late Cretaceous duck-billed dinosaur Edmontosaurus annectens
- †Egertonodus
- †Elaphrosaurus – tentative report
- †Elasmosaurus
- †Elatides
- †Ellipsoscapha
- †Emarginachelys
- †Empo
- †Enneabatrachus – type locality for genus
- †Enneabatrachus hechti – type locality for species
- Entalis
- †Entalis paupercula – tentative report
- †Entalophora
- †Entalophora stokesi – type locality for species
- †Eobatrachus – type locality for genus
- †Eobatrachus agilis – type locality for species
- †Eocephalites
- †Eokainaster – type locality for genus
Fossilized skeleton of the Eocene-Pliocene frog Eopelobates - †Equisetites
- †Equisetum
- †Equisetum FF014 – informal
- †Equisetum RS016 – informal
- †Equisetum virginicum
- †Essonodon
- †Estescincosaurus – type locality for genus
- †Estescincosaurus cooki – type locality for species
- †Eubaena – type locality for genus
- †Eubaena cephalica – type locality for species
Fossilized shell of the Late Cretaceous ammonoid cephalopod Eubostrychoceras - †Eubostrychoceras matsumotoi – type locality for species
- †Eubrachiosaurus – type locality for genus
- †Eubrachiosaurus browni – type locality for species
- †Eucalycoceras
- †Eucrossorhinus
- †Eumorphotis
- †Euomphaloceras
- †Eurysalenia
- †Euspira
- †Euthlastus – type locality for genus
- †Euthlastus cordiformis – type locality for species
Illustration in multiple views of a fossilized shell of the Late Jurassic-Miocene nautiloid cephalopod Eutrephoceras - †Eutretauranosuchus
- †Exiteloceras
- †Exogyra
- †Exostinus – type locality for genus
- †Exostinus lancensis – type locality for species
F edit
- †Falepetrus
- †Falepetrus barwini – type locality for species
Shell of a Fasciolaria, or tulip sea snail - †Fasciolaria flexicostata – tentative report
- †Feistmantelia – type locality for genus
- †Feistmantelia oblonga – type locality for species
- †Ficophyllum
- Ficus
- †Filicites
- †Forresteria
Known material diagram of the Late Jurassic ceratosaur Fosterovenator - †Fosterovenator churei – type locality for species
- †Foxraptor – type locality for genus
- †Foxraptor atrox – type locality for species
- †Fraxinus
G edit
Fossilized skull of the Late Jurassic long-necked dinosaur Galeamopus - †Galeamopus hayi
- †Galeamopus pabsti – type locality for species
- †Gargoyleosaurus
- †Geinitzia
- †Geinitzia Jenneyi – type locality for species
- †Geonomites
- Gerrhonotus – or unidentified comparable form
- †Gervillaria
- †Gervillia
- †Gervillia dolabrata
- †Gervillia ussurica – or unidentified comparable form
- †Gilmoremys
- †Gilmoremys lancensis – type locality for species
- Ginglymostoma
Fossilized leaf of the Permian-modern tree Ginkgo - †Ginkgo adiantoides – tentative report
- †Glasbius
- †Glasbius intricatus – type locality for species
- †Gleichenites
- †Glyptops – type locality for genus
- †Glyptops pervicax
- †Glyptops plicatulus – type locality for species
- Glyptostrobus
Mounted fossilized skeleton of the Middle Jurassic-Late Cretaceous mammal Gobiconodon - †Goniomya
- †Goniopholis
- †Gracilimanus
- †Grammatodon
- †Graphidula
- †Graphidula alleni – or unidentified comparable form
Interior and exterior of a fossilized shell of the Late Triassic-Eocene marine bivalve Gryphaea
- †Grewiopsis
- †Gryphaea
- †Gypsonictops
- †Gypsonictops hypoconus – type locality for species
- †Gypsonictops lewisi
- †Gypsonicus
H edit
- †Habrosaurus – type locality for genus
- †Habrosaurus dilatus – type locality for species
- †Hadrosauropodus
- †Halymenites
- †Hamites
Life restoration of the Late Jurassic sauropod dinosaur Haplocanthosaurus - †Haptosphenus – type locality for genus
- †Haptosphenus placodon – type locality for species
- †Haresiceras
- †Harpactognathus – type locality for genus
- †Harpactognathus gentryii – type locality for species
- †Hatcheritherium – type locality for genus
- †Hatcheritherium alpha – type locality for species
- †Hausmannia
- †Helopanoplia
- Hemiaster
Known material diagram of the Middle-Late Triassic distant crocodilian relative Heptasuchus - †Heptasuchus clarki – type locality for species
- †Herpetarius
- †Hesperornithoides – type locality for genus[1]
- †Hesperornithoides miessleri – type locality for species[1]
- †Hesperosaurus – type locality for genus
- †Hesperosaurus mjosi – type locality for species
- †Heteroceras
- †Heteroceras cochleatum – tentative report
- †Homomya
- †Hoploscaphites[2]
- †Hoploscaphites birkelundae – type locality for species
- †Hoploscaphites gilli
- †Hoploscaphites macer[2]
- †Hoploscaphites nodosus
- †Hoploscaphites plenus
- †Hoploscaphites quadrangularis
- †Hummelichelys
- †Hummelichelys beecheri – type locality for species
Life restoration of the Late Triassic rhynchosaur Hyperodapedon - †Hybodus montanensis
- †Hybodus wyomingensis – type locality for species
- †Hyperodapedon
- †Hyperodapedon sanjuanensis – or unidentified comparable form
- †Hypotodus
- †Hypsodon – tentative report
I edit
Life restoration of the Late Cretaceous bony fish Ichthyodectes - †Icthyodectes – tentative report
- †Icthyodesctes – tentative report
- †Idiohamites
- †Iguanavus
- †Iguanavus teres – type locality for species
Fossilized shell of the Early Jurassic-Late Cretaceous marine bivalve Inoceramus with a human indicating its size - †Inoceramus agdjakendensis – or unidentified comparable form
- †Inoceramus americanus – type locality for species
- †Inoceramus anglicus
- †Inoceramus balchii
- †Inoceramus barabini
- †Inoceramus crispii
- †Inoceramus deformis
- †Inoceramus dimidius
- †Inoceramus erectus – or unidentified related form
- †Inoceramus fibrosus
- †Inoceramus fragilis – or unidentified related form
- †Inoceramus gibbosus
- †Inoceramus glacierensis
- †Inoceramus grandis
- †Inoceramus incurvus
- †Inoceramus lundbreckensis
- †Inoceramus perplexus
- †Inoceramus prefragilis
- †Inoceramus proximus – or unidentified related form
- †Inoceramus sagensis
- †Inoceramus subcircularis
- †Inoceramus subcompressus
- †Inoceramus sublaevis
- †Inoceramus tenuirostratus
- †Inoceramus tenuiumbonatus – or unidentified comparable form
- †Inoceramus turgidus – or unidentified related form
- †Inoceramus typicus
- †Inoceramus umbonatus
- †Inoceramus undabundus
- †Ischyrhiza
Fossilized shell of the Permian-modern marine bivalve Isognomon - †Ischyrhiza basinensis – type locality for species
- †Ischyrhiza mira
- Isocrinus
- †Isocyprina
- Isognomon
- †Isognomon perplana – or unidentified comparable form
- Isurus – tentative report
J edit
- †Janumys
- †Jeletzkytes
- †Jeletzkytes dorfi – type locality for species
- †Jensensispermum
- †Judithemys
K edit
- †Kaatedocus – type locality for genus
- †Kaatedocus siberi – type locality for species
- †Koskinonodon – type locality for genus
- †Koskinonodon perfectus – type locality for species
L edit
- †Lamarqueavis
- †Lamarqueavis minima – type locality for species
- †Lamarqueavis petra – type locality for species
- †Lamiasaura – type locality for genus
- †Lamiasaura ferox – type locality for species
- †Lanceosaurus – type locality for genus
- †Lanceosaurus compressus – type locality for species
- †Lanceosaurus hatcheri – type locality for species
- †Laolestes – type locality for genus
- †Laolestes eminens – type locality for species
- †Laolestes goodrichi – type locality for species
- †Laolestes oweni – type locality for species
- †Laopteryx – type locality for genus
- †Laopteryx priscus – type locality for species
- †Laosaurus – type locality for genus
- †Laosaurus celer – type locality for species
- †Laurophyllum
- Laurus
- †Laurus aspensis – type locality for species
- †Lepidotes – or unidentified related form
- Lepisosteus
- †Leptalestes
- †Leptalestes cooki – type locality for species
- †Leptalestes krejcii
Life restoration of the Late Cretaceous primitive horned dinosaur Leptoceratops - †Leptochamops
- †Leptochamops denticulatus – type locality for species
- †Leptochamops thrinax
- †Leptochondria
- †Leptostrobus
- †Leptostrobus alatus – type locality for species
- †Leptostrobus longifolia
- †Leptostrobus longifolius
- †Lesterwardia – type locality for genus
- †Lesterwardia palustris – type locality for species
- †Leucichthyops
- †Leucicthyops
- Lima
- Lingula
- †Lingula nitida – or unidentified comparable form
- †Lingularia
- †Lioplacodes – or unidentified comparable form
- †Liostrea
- Liquidambar
- †Liquidambar fontanella – type locality for species
- †Lisserpeton
Electron micrograph of fossilized teeth from the Early Jurassic-Early Cretaceous freshwater shark Lissodus - †Lissodus griffisi – type locality for species
- †Litakis – type locality for genus
- †Litakis gilmorei – type locality for species
- †Lonchidion – type locality for genus
- †Lonchidion selachos – type locality for species
- †Lonchisaurus – type locality for genus
- †Lonchisaurus trichurus – type locality for species
- †Lonchodytes – type locality for genus
- †Lonchodytes estesi – type locality for species
- †Lonchodytes pterygius – type locality for species
- †Lophochelys
A living Lunatia moon sea snail - †Lucina mattiformis – or unidentified comparable form
- †Lucina occidentalis
- †Lucina subundata
- Lunatia – tentative report
- Lygodium
- †Lygodium AF030 – informal
- †Lyosoma
M edit
Diagram illustrating the known fossil material of two specimens of the Late Jurassic crocodile relative Macelognathus - †Macelognathus vagans – type locality for species
- Mactra
- †Mactromya – tentative report
- †Magadiceramus
- †Magnoliophyllum
- †Malapoenna
- †Malapoenna weediana – tentative report
- Malletia
- †Manihotites
- †Martinectes
- †Martinectes bonneri – type locality for species
- †Matonidium
- †Mecochirus
Life restoration of the Late Jurassic plesiosaur Megalneusaurus - †Megalneusaurus rex – type locality for species
- †Megasphaeroceras
- †Megasphaeroceras rotundum – or unidentified comparable form
- †Meleagrinella
- †Melvius
- †Meniscoessus
- †Meniscoessus gracilis – type locality for species
- †Meniscoessus intermedius
- †Meniscoessus robustus – type locality for species
- †Meniscoessus seminoensis – type locality for species
- †Meniscognathus – type locality for genus
- †Meniscognathus altmani – type locality for species
- †Menispermites
Assemblage of fossilized shells of the Late Cretaceous ammonoid cephalopod Menuites - †Mesembrioxylon
- †Mesodma
- †Mesodma formosa
- †Mesodma hensleighi
- †Mesodma primaeva
- †Mesodma thompsoni – type locality for species
- †Metaptychoceras
- †Metoicoceras
- †Metoicoceras geslinianum
- †Metoicoceras mosbyense – or unidentified comparable form
- †Metoicoceras praecox
- †Micrabacia
- †Microtaenia
Life restoration of the Early Cretaceous oviraptorosaur Microvenator - †Minerisporites
- Modiolus
- †Montania – type locality for genus
- †Montania glandulosa – type locality for species
- †Moremanoceras
- †Moriconia
- †Morosaurus
- †Myalina
- †Myledaphus
Fossilized shell of the Jurassic-Cretaceous marine bivalve Myophorella - Myrica
- †Myrica bolanderi – tentative report
- †Myrica nervosa
- †Myrtophyllum
- †Mytiloides
- †Mytilus
N edit
- †Nageiopsis
- †Nanocuris
- †Nanomyops
- †Nanosaurus
- †Nanotyrannus – tentative report
- †Naomichelys
A living Nelumbo lotus - †Nelumbo weymouthi – type locality for species
- †Nelumbo weymouthii
- †Nemocardium
- †Nemodon
- †Neocardioceras
- †Neocardioceras laevigatum – type locality for species
- †Neocardioceras minutum – type locality for species
- †Neocardioceras transiens
- †Neocardioceras uptonense – type locality for species
- †Neogastroplites
- †Neonereites – or unidentified comparable form
- †Neoplagiaulax
- †Neoschizodus
- †Nerinea – tentative report
- †Neurankylus
- †Neurankylus wyomingensis – type locality for species
- †Nilsonia
- Nodosaria
Historical reconstruction of the holotype skeleton from 1921 - †Nodosaurus textilis – type locality for species
- †Nonactaeonina
- †Normannites – tentative report
- †Normannites crickmayi – or unidentified comparable form
- †Nortedelphys
Interior of a fossilized shell of the Early Ordovician-modern marine bivalve Nucula - Nuculana
- †Nuculana bisulcata
- †Nuculana corsicana
- †Nuculana equilateralis – tentative report
- †Nuculana evansi
- †Nuculana pittensis
- †Nymphaeites
_01.jpg)
O edit
- †Obamadon
- †Obnixia – type locality for genus
- †Odaxosaurus – type locality for genus
- †Odaxosaurus piger – type locality for species
A living Odontaspis sand shark - †Odontaspis cheathami – type locality for species
- †Odontaspis steineri – type locality for species
- †Oklatheridium
- †Oligoptycha
- †Omasaria
- †Onoclea
- †Opertochasma
- †Ophiopsis
- †Ophthalmosaurus
- †Opisthias
- †Opisthias rarus – type locality for species
- †Opisthotriton
Mounted fossilized skeleton of the Late Jurassic theropod dinosaur Ornitholestes - †Ornitholestes hermanni – type locality for species
- †Ornithomimus
- †Ornithomimus minutus
- †Ornithomimus sedens – type locality for species
- †Ornithomimus velox – or unidentified comparable form
- †Orthotrigonia
- †Orthotrigonia sohli – tentative report
- †Osmakasaurus – tentative report
Mounted fossilized skeleton of the Late Jurassic herbivorous dinosaur Othnielosaurus - †Othnielia
- †Othnielosaurus
- †Othnielosaurus consors – type locality for species
- †Oxybeloceras
- †Oxytoma
P edit
Fossilized skeleton of the Late Cretaceous dome-headed dinosaur Pachycephalosaurus - †Pachycephalosaurus wyomingensis – type locality for species
- †Pachyrhizodus
- †Pachyteuthis
- †Palaeoaster
- †Palaeobatrachus
- †Palaeobatrachus occidentalis – type locality for species
- †Palaeocypraea
- †Palaeocypraea squyeri – type locality for species
- †Palaeosaniwa – type locality for genus
- †Palaeosaniwa canadensis – type locality for species
- †Paleoaster
- †Paleopsephurus
- †Paleorhinus
- †Paleorhinus parvus – type locality for species
- †Paliurus
- †Paliurus minimus
- †Paliurus zizyphoides – tentative report
- †Pantosaurus – type locality for genus
- †Pantosaurus striatus – type locality for species
- †Parachondroceras
- †Paracimexomys
- †Paracredneria
- †Paracredneria cretacea – type locality for species
- †Paraderma – type locality for genus
- †Paraderma bogerti – type locality for species
- †Paradiscoglossus – type locality for genus
- †Paradiscoglossus americanus – type locality for species
- †Paralbula
- †Paramacellodus
- †Paranymphaea
- †Parasaniwa – type locality for genus
- †Parasaniwa wyomingensis – type locality for species
- †Parastomechinus
Life restoration of the Late Triassic phytosaur Parasuchus - †Parasuchus bransoni – type locality for species
- †Paressonodon
- †Pariguana – type locality for genus
- †Pariguana lancensis – type locality for species
- †Parikimys
- †Parmicorbula
- †Paronychodon
- †Paronychodon lacustris – type locality for species
- †Parvodus
- †Paurodon – type locality for genus
- †Paurodon valens – type locality for species
- †Pecopteris
- Pecten
Micrograph of a fossilized tooth of the Late Cretaceous troodontid Pectinodon - †Pectinodon bakkeri – type locality for species
- †Pediomys
- †Pediomys elegans – type locality for species
- †Pentacrinus
- †Permophorus
- †Permophorus triassicus – type locality for species
- Persea – report made of unidentified related form or using admittedly obsolete nomenclature
- †Petalolepis – tentative report
- †Phlycticrioceras
- †Phoenicites – or unidentified comparable form
Fossilized shell of the Early Triassic-Pliocene marine bivalve Pholadomya - †Phragmites
- †Phyllites
- Phyllodus
A live individual of Physa marmorata - †Piceoerpeton
- Pinna
- Pinus
- Pistacia
- †Pistia
Fossilized shell of the Late Cretaceous ammonoid cephalopod Placenticeras - †Plagiostoma
- Planorbis
- †Plastomenus
- †Platacodon – type locality for genus
- †Platacodon nanus – type locality for species
- †Platanites
- †Platanophyllum
- Platanus
Life restoration of the Late Cretaceous mosasaur Platecarpus - †Platymya
- †Platypterygius
- †Platypterygius americanus – type locality for species
- †Plesiacanthoceras
- †Plesiacanthoceras bellsanum – or unidentified comparable form
- †Plesiacanthoceras wyomingense
- †Plesiobaena
Life restoration of the Late Cretaceous plesiosaur Plesiopleurodon - †Plesiopleurodon wellesi – type locality for species
- †Plesiosaurus
- †Plesiosaurus shirleyensis – type locality for species
- †Pleuromya
- †Pleuromya haydeniana – type locality for species
- †Pleuromya subcompressa
- †Plicatolamna
- Plicatula
- Polinices
- †Polinices concinna – or unidentified related form
- †Polyacrodus
- †Polyacrodus parvidens – or unidentified comparable form
- †Polycotylus
Restoration of the Late Triassic crocodile relative Poposaurus with an anachronistic human to scale - †Poposaurus gracilis – type locality for species
- Populus
- †Populus aspens
- †Populus aspensis – type locality for species
- †Porosoma
- †Porosoma reesidei – type locality for species
- †Portheus
- †Postligata
- †Potamoceratodus
- †Potamornis – type locality for genus
- †Potamornis skutchi – type locality for species
- †Powellia – type locality for genus
- †Powellia oblongata – type locality for species
- †Priacodon
- †Priacodon ferox – type locality for species
- †Priacodon grandaevus – type locality for species
- †Priacodon lulli – type locality for species
- †Priacodon robustus – type locality for species
- †Prionocyclus
- †Prodesmodon – type locality for genus
- †Prodesmodon copei – type locality for species
- †Prodiplocynodon – type locality for genus
- †Prodiplocynodon langi – type locality for species
- †Promyalina
- †Pronoella
- †Pronoella cinnabarensis
- †Pronoella iddingsi – or unidentified comparable form
- †Pronoella uintahensis
- †Prorokia
- †Protalphadon
- †Protalphadon lulli – type locality for species
- †Protexanites
- †Protocardia
- †Protocardia rara
- †Protocardia schucherti – or unidentified comparable form
- †Protophyllocladus
- †Protophyllum
- †Protoplatyrhina
Fossilized mandible of the Late Cretaceous-Paleocene mammal Protungulatum - Prunus
- †Prunus aspensis – type locality for species
- †Psalodon
- †Psalodon fortis – type locality for species
- †Psalodon marshi – type locality for species
- †Psalodon potens – type locality for species
- †Pseudoctenis
- †Pseudoctenis AF013 – informal
- †Pseudodontaspis – type locality for genus
- †Pseudodontaspis herbsti – type locality for species
- †Pseudoperna
- †Pteraichnus
- †Pteraichnus stokesi – type locality for species
Life restoration of the Late Cretaceous pterosaur Pteranodon - †Pteria
- †Pteria gastrodes
- †Pteria linguaeformis
- †Pteria linguiformis
- †Pteria lingulaeformis
- †Pteria ussurica – or unidentified comparable form
- †Pterodactylus
- †Pterodactylus montanus – type locality for species
- †Ptilotodon
- †Ptychodous
- †Ptychotrygon
- †Ptychotrygon boothi – type locality for species
- †Ptychotrygon ellae – type locality for species
- †Ptychotrygon greybullensis – type locality for species
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Q edit
- †Quenstedtia
- †Quenstedtia sublevis
A living Quercus, or oak tree
- †Quercophyllum
- †Quercophyllum gardneri
- †Quercophyllum wyomingense – type locality for species
- Quercus
- †Quereuxia
R edit
- †Raninella
- †Reesidella
- †Retinovena – type locality for genus
- †Retinovena fluvialis – type locality for species
- †Retispira
- Rhabdocolpus – tentative report
- †Rhaeboceras
- †Rhamnus
Micrograph with magnified inset of a fossilized tooth of the Late Cretaceous theropod dinosaur Richardoestesia - †Rhamnus minutus
- Rhinobatos
- †Rhizocorallium
- †Rhynchosauroides – type locality for genus
- †Rhynchosauroides palmatus – type locality for species
- †Richardoestesia
- †Ropalonaria
- Rostellaria – tentative report
- †Rotodactylus – or unidentified comparable form
S edit
- †Sabalites
- †Saccoloma – report made of unidentified related form or using admittedly obsolete nomenclature
- †Saliciphyllum
A living Salix, or willow - †Salpichlaena
- †Salpichlaena AF003 – informal
- †Sapindopsis
- †Sapindopsis belviderensis
- †Sapindopsis magnifolia
- †Sapindopsis schultzi – type locality for species
- †Sapindopsis schultzii
- †Sapindopsis variabilis
- †Sarjeantopodus – type locality for genus
- †Sarjeantopodus semipalmatus – type locality for species
Foliage of a living Sassafras tree - †Sassafras bradleyi – type locality for species
- †Sassafras bradleyii
- †Sassafras thermale
- †Saurexallopus – type locality for genus
- †Saurexallopus lovei – type locality for species
- †Saurexallopus zerbsti – type locality for species
- †Saurocephalus
- †Saurolophus
- †Sauropelta
Diagram illustrating the Early Cretaceous long-necked dinosaur Sauroposeidon with anachronistic humans to scale - †Saurornithoides – or unidentified comparable form
- †Saurornitholestes
- †Sauvagesia
- †Sauvagesia austinensis – or unidentified comparable form
- †Scapanorhynchus
- †Scapherpeton
Fossilized shell of the Late Cretaceous ammonoid cephalopod Scaphites - †Scleropteris
- †Scleropteris distantifolia – type locality for species
- †Scleropteris rotundifolia – type locality for species
- †Scotiophryne
- Scyliorhinus
- †Scyliorhinus tensleepensis – type locality for species
- †Selaginella
- †Selaginella falcata – tentative report
- †Semiungula – type locality for genus
- †Semiungula assymetrica – type locality for species
Base of the trunk of a living Sequoia tree with a human to scale - †Serrifusus
- †Skolithos
- †Smilax
- †Smilax coloradensis – tentative report
- †Socognathus
- †Socognathus brachyodon – type locality for species
- †Sohlites
- †Sokophyllum – type locality for genus
- †Sokophyllum dentatum – type locality for species
Modern specimen of the marine bivalve Solemya - †Solenoceras
- †Solyma
- †Sparganium
- †Sparganium aspens
- †Sparganium aspensis – type locality for species
- Sphaerium – or unidentified comparable form
- †Sphenodiscus
- †Sphenodiscus lobatus – or unidentified comparable form
- †Sphenodiscus pleurisepta
- †Sphenolepidium
- †Sphenopteris
- †Spiroceras
- †Spiroceras orbignyi – or unidentified comparable form
Fossilized tooth of the Late Cretaceous shark Squalicorax - †Squatirhina
- †Squatirhina americana – type locality for species
- †Squatirhina roessingi – type locality for species
- †Staphylea
- †Stegopelta – type locality for genus
- †Stegopelta landerensis – type locality for species
Restoration of the Late Jurassic stegosaur Stegosaurus - †Stegosaurus affinis – type locality for species
- †Stegosaurus armatus – type locality for species
- †Stegosaurus longispinus – type locality for species
- †Stegosaurus stenops
- †Stegosaurus sulcatus – type locality for species
- †Stegosaurus ungulatus – type locality for species
- †Steinichnus
- †Stemmatoceras
- †Stemmatoceras albertense – or unidentified related form
- Sterculia
- †Stokesosaurus – tentative report
- †Struthiomimus – or unidentified comparable form
Restoration in multiple views of the Late Jurassic sauropod dinosaur Supersaurus with an anachronistic human to scale - †Styxosaurus
- †Styxosaurus browni – type locality for species
- †Supersaurus
- †Syncyclonema
- †Synechodus
- †Synechodus turneri – type locality for species
T edit
- †Tancredia
Life restoration of the Late Jurassic theropod dinosaur Tanycolagreus - †Tanycolagreus topwilsoni – type locality for species
- Tapeinidium
- Tapeinidium undulatum – tentative report
- †Tarrantoceras
- †Tarrantoceras exile – type locality for species
- †Tarrantoceras flexicostatum – type locality for species
- †Tarrantoceras sellardsi
- †Tatenectes
- †Tatenectes laramiensis – type locality for species
- †Tathiodon – type locality for genus
- †Tathiodon agilis – type locality for species
- †Telacodon
- †Telacodon laevis – type locality for species
- †Tenea
Life restoration of the Early Cretaceous Iguanodon relative Tenontosaurus - Teredo
- †Thalassinoides
- †Theatonius – type locality for genus
- †Theatonius lancensis – type locality for species
- †Theretairus – type locality for genus
- †Theretairus antiquus – type locality for species
Life restoration of the Late Cretaceous herbivorous dinosaur Thescelosaurus - †Thescelosaurus neglectus – type locality for species
- †Thescelus
- †Thescelus insiliens – type locality for species
- †Thoracosaurus – or unidentified comparable form
- Thracia
- Thyasira
Illustration of a living Thyrsopteris tree fern - †Tinodon – type locality for genus
- †Tinodon bellus – type locality for species
- †Torosaurus – type locality for genus
- †Torosaurus latus – type locality for species
- †Torotix – type locality for genus
- †Torotix clemensi – type locality for species
Mounted fossilized skeleton of the Late Jurassic megalosaur Torvosaurus - †Torvosaurus tanneri – type locality for species
- †Trachodon
- †Trachyscaphites
- †Trachytriton
- †Tragodesmoceras
- †Trapa
Mounted fossilized skeleton of the Late Cretaceous horned dinosaur Triceratops - †Triceratops horridus – type locality for species
- †Triceratops ingens – type locality for species
- †Triceratops prorsus – type locality for species
- †Triceratops sulcatus – type locality for species
- †Trigonia
- †Trioracodon
- †Trioracodon bisulcus – type locality for species
Fossilized skeleton of the Late Cretaceous tyrannosaur Tyrannosaurus - †Trochodendroides
- †Troodon
- †Turgidodon
- †Turgidodon rhaister – type locality for species
- †Turgidodon russelli
- Typha
- †Tyrannosaurus – type locality for genus
- †Tyrannosaurus rex – type locality for species
U edit
- †Ulmiphyllum
- †Ulmiphyllum densinerve – type locality for species
- †Uluops – type locality for genus
- †Uluops uluops – type locality for species
- Unio
- †Unionites
V edit
- Vanikoro
- †Vanikoropsis
- †Vaugonia
Leaves and fruit of a living Vitis, or grapevine
- †Veniella
- †Viburnum
- Vitis
- Viviparus – or unidentified comparable form
- †Volutoderma
W edit
- †Weediaphyllum – type locality for genus
- †Weediaphyllum parkensis – type locality for species
- †Weichselia
- †Williamsonia – tentative report
- †Williamsonia phoenicopsoides – type locality for species
- †Woodwardia
X edit
Y edit
- Yoldia
- †Yoldia scitula – or unidentified related form
- †Yoldia ventricosa
Z edit
- †Zamites
- †Zapsalis – or unidentified comparable form
- †Zephyrosaurus – or unidentified comparable form
- †Zofiabaatar – type locality for genus
- †Zofiabaatar pulcher – type locality for species
References edit
- ^ a b Scott Hartman; Mickey Mortimer; William R. Wahl; Dean R. Lomax; Jessica Lippincott; David M. Lovelace (2019). "A new paravian dinosaur from the Late Jurassic of North America supports a late acquisition of avian flight". PeerJ. 7: e7247. doi:10.7717/peerj.7247. PMC 6626525. PMID 31333906.
- ^ a b Neil H. Landman; W. James Kennedy; Neal L. Larson; Joyce C. Grier; James W. Grier; Tom Linn (2019). "Description of two species of Hoploscaphites (Ammonoidea, Ancyloceratina) from the Upper Cretaceous (Lower Maastrichtian) of the U.S. Western Interior". Bulletin of the American Museum of Natural History. 2019 (427): 1–72. doi:10.1206/0003-0090.427.1.1. hdl:2246/6926.
- ^ Johnson, Kirk. (2002). Megaflora of the Hell Creek and lower Fort Union Formations in the western Dakotas: Vegetational response to climate change, the Cretaceous-Tertiary boundary event, and rapid marine transgression. 10.1130/0-8137-2361-2.329.
External links edit
- Various Contributors to the Paleobiology Database. "Fossilworks: Gateway to the Paleobiology Database". Retrieved 17 December 2021.
