List of marine cnidarians of South Africa

The list of marine cnidarians of South Africa is a list of saltwater species that form a part of the cnidarian (Phylum Cnidaria) fauna of South Africa. This list does not include the freshwater cnidarians. The list follows the SANBI listing on iNaturalist, and does not always agree with WoRMS for distribution.

Map of the Southern African coastline showing some of the landmarks referred to in species range statements

Cnidaria (/nɪˈdɛəri.ə, n-/ ni-DAIR-ee-ə, NY-) is a phylum under kingdom Animalia containing over 11,000 species of aquatic animals found both in fresh water and marine environments (predominantly the latter), including jellyfish, hydroids, sea anemones, corals and some of the smallest marine parasites. Their distinguishing features are a decentralized nervous system distributed throughout a gelatinous body and the presence of cnidocytes or cnidoblasts, specialized cells with ejectable flagella used mainly for envenomation and capturing prey. Their bodies consist of mesoglea, a non-living, jelly-like substance, sandwiched between two layers of epithelium that are mostly one cell thick. Cnidarians are also some of the only animals that can reproduce both sexually and asexually.

Cnidarians mostly have two basic body forms: swimming medusae and sessile polyps, both of which are radially symmetrical with mouths surrounded by tentacles that bear cnidocytes, which are specialized stinging cells used to capture prey. Both forms have a single orifice and body cavity that are used for digestion and respiration. Many cnidarian species produce colonies that are single organisms composed of medusa-like or polyp-like zooids, or both (hence they are trimorphic). Cnidarians' activities are coordinated by a decentralized nerve net and simple receptors. Cnidarians also have Rhopalia, which are involved in gravity sensing and sometimes chemoreception. Several free-swimming species of Cubozoa and Scyphozoa possess balance-sensing statocysts, and some have simple eyes. Not all cnidarians reproduce sexually, but many species have complex life cycles of asexual polyp stages and sexual medusae stages. Some, however, omit either the polyp or the medusa stage, and the parasitic classes evolved to have neither form.

Cnidarians were formerly grouped with ctenophores, also known as comb jellies, in the phylum Coelenterata, but increasing awareness of their differences caused them to be placed in separate phyla. Cnidarians are classified into four main groups: the almost wholly sessile Anthozoa (sea anemones, corals, sea pens); swimming Scyphozoa (jellyfish); Cubozoa (box jellies); and Hydrozoa (a diverse group that includes all the freshwater cnidarians as well as many marine forms, and which has both sessile members, such as Hydra, and colonial swimmers (such as the Portuguese man o' war)). Staurozoa have recently been recognised as a class in their own right rather than a sub-group of Scyphozoa, and the highly derived parasitic Myxozoa and Polypodiozoa were firmly recognized as cnidarians only in 2007.

Most cnidarians prey on organisms ranging in size from plankton to animals several times larger than themselves, but many obtain much of their nutrition from symbiotic dinoflagellates, and a few are parasites. Many are preyed on by other animals including starfish, sea slugs, fish, turtles, and even other cnidarians. Many scleractinian corals—which form the structural foundation for coral reefs—possess polyps that are filled with symbiotic photo-synthetic zooxanthellae. While reef-forming corals are almost entirely restricted to warm and shallow marine waters, other cnidarians can be found at great depths, in polar regions, and in freshwater.

Cnidarians are a very ancient phylum, with fossils having been found in rocks formed about 580 million years ago during the Ediacaran period, preceding the Cambrian Explosion. Other fossils show that corals may have been present shortly before 490 million years ago and diversified a few million years later. Molecular clock analysis of mitochondrial genes suggests an even older age for the crown group of cnidarians, estimated around 741 million years ago, almost 200 million years before the Cambrian period, as well as before any fossils. Recent phylogenetic analyses support monophyly of cnidarians, as well as the position of cnidarians as the sister group of bilaterians. (Full article...)

Class Anthozoa, subclass Hexacorallia edit

Order Actiniaria, suborder Endocoelantheae edit

Family Halcuriidae edit

Suborder Nynantheae, infraorder Athenaria edit

Family Edwardsiidae edit

Family Halcampidae edit

Family Haloclavidae edit

Infraorder Thenaria edit

Superfamily Acontiaria, family Acontiophoridae edit

Family Aiptasiidae edit

Family Hormathiidae edit

Family Isophellidae edit

Family Nemanthidae edit

Family Sagartiidae edit

Superfamily Endomyaria, family Actiniidae edit

Family Actinodendronidae edit

Family Aliciidae edit

Family Condylanthidae edit

Family Liponematidae edit

Family Stichodactylidae edit

Superfamily Mesomyaria, family Actinostolidae edit

Suborder Ptychodacteae edit

Family Preactiidae edit

  • Preactis millardae England in England & Robson, 1984 – Walking anemone, hedgehog anemone, sock anemone[1]

Superfamily Actiniaria incertae sedis, family Metridiidae edit

Order Antipatharia edit

Family Antipathidae edit

Order Ceriantharia, suborder Spirularia edit

Family Cerianthidae edit

Order Corallimorpharia edit

Family Corallimorphidae edit

Family Discosomatidae edit

Order Scleractinia edit

Family Acroporidae edit

Family Agariciidae edit

Family Caryophylliidae edit

Family Coscinaraeidae edit

Family Dendrophylliidae edit

Family Euphylliidae edit

Family Fungiidae edit

Family Lobophylliidae edit

Family Merulinidae edit

Family Mussidae, subfamily Faviinae edit

  • Favia spp. – False honeycomb corals[1]

Family Plesiastreidae edit

Family Pocilloporidae edit

Family Poritidae edit

Family Psammocoridae edit

Scleractinia incertae sedis edit

Scleractinia incertae sedis edit

Order Zoantharia, suborder Brachycnemina edit

Family Sphenopidae edit

Family Zoanthidae edit

Suborder Macrocnemina edit

Family Parazoanthidae edit

Subclass Octocorallia edit

Order Alcyonacea, suborder Alcyoniina edit

Family Alcyoniidae edit

Family Nephtheidae edit

Family Nidaliidae edit

Family Parasphaerascleridae edit

Family Xeniidae edit

Order Calcaxonia edit

Family Chrysogorgiidae edit

Family Ellisellidae edit

Family Isididae edit

Family Primnoidae edit

Subrder Holaxonia edit

Family Acanthogorgiidae edit

Family Gorgoniidae edit

Family Keroeididae edit

Family Plexauridae edit

Suborder Scleraxonia edit

Family Anthothelidae edit

Subfamily Melithaeinae edit

Suborder Stolonifera edit

Family Clavulariidae edit

Family Tubiporidae edit

Order Pennatulacea edit

Family Chunellidae edit

Family Echinoptilidae edit

Family Scleroptilidae edit

Suborder Sessiliflorae edit

Family Anthoptilidae edit

Family Funiculinidae edit

Family Kophobelemnidae edit

Family Protoptilidae edit

Family Umbellulidae edit

Family Veretillidae edit

suborder Subsessiliflorae edit

Family Halipteridae edit

Family Pennatulidae edit

Family Virgulariidae edit

Class Cubozoa edit

Order Carybdeida edit

Family Carybdeidae edit

Family Tamoyidae edit

Order Chirodropida edit

Family Chirodropidae edit

Family Chiropsalmidae edit

Class Hydrozoa, subclass Hydroidolina edit

Order Anthoathecata, suborder Aplanulata edit

Family Candelabridae edit

Family Corymorphidae edit

Family Tubulariidae edit

Suborder Capitata edit

Family Asyncorynidae edit

Family Cladocorynidae edit

Family Family Cladonematidae edit

Family Corynidae edit

Family Halimedusidae edit

Family Milleporidae edit

Family Moerisiidae edit

Family Pennariidae edit

Family Porpitidae edit

Family Solanderiidae edit

Family Sphaerocorynidae edit

Family Teissieridae edit

Family Zancleidae edit

Family Zancleopsidae edit

Capitata incertae sedis edit

Capitata incertae sedis edit

Capitata incertae sedis edit

Suborder Filifera edit

Family Bougainvilliidae edit

Family Bythotiaridae edit

Family Cytaeididae edit

Family Eudendriidae edit

Family Hydractiniidae edit

Family Hydrichthyidae edit

Family Magapiidae edit

Family Oceaniidae edit

Family Pandeidae edit

Family Proboscidactylidae edit

Family Rathkeidae edit

Family Stylasteridae edit

Order Leptothecata edit

Family Aequoreidae edit

Family Blackfordiidae edit

Family Campanulinidae edit

Family Campanulariidae edit

Family Eirenidae edit

Family Hebellidae edit

Family Laodiceidae edit

Family Lineolariidae edit

Family Lovenellidae edit

Family Malagazziidae edit

Family Mitrocomidae edit

Family Phialellidae edit

Family Sertulariidae edit

Family Syntheciidae edit

Family Thyroscyphidae edit

Family Tiarannidae edit

Family Tiaropsidae edit

Superfamily Plumularioidea, family Aglaopheniidae edit

Family Haleciidae edit

Family Halopterididae edit

Family Kirchenpaueriidae edit

Family Lafoeidae edit

Family Plumulariidae edit

Order Siphonophorae, suborder Calycophorae edit

Family Abylidae, subfamily Abylinae edit

Subfamily Abylopsinae edit

Family Clausophyidae edit

Family Diphyidae, subfamily Diphyinae edit

Subfamily Sulculeolariinae edit

Family Hippopodiidae edit

Family Prayidae, subfamily Amphicaryoninae edit

Subfamily Nectopyramidinae edit
Subfamily Prayinae edit

Family Sphaeronectidae edit

Suborder Cystonectae edit

Family Physaliidae edit

Family Rhizophysidae edit

Suborder Physonectae edit

Family Agalmatidae edit

Family Apolemiidae edit

Family Forskaliidae edit

Family Physophoridae edit

Family Pyrostephidae edit

Subclass Trachylinae edit

Order Limnomedusae edit

Family Olindiidae edit

Order Narcomedusae edit

Family Aeginidae edit

Family Cuninidae edit

Family Solmarisidae edit

Order Trachymedusae edit

Family Geryoniidae edit

Family Halicreatidae edit

Family Rhopalonematidae edit

Class Scyphozoa edit

Order Coronatae edit

Family Atollidae edit

Family Nausithoidae edit

Family Periphyllidae edit

Order Carybdeida edit

Family Carybdeidae edit

Order Rhizostomeae, suborder Kolpophorae edit

Family Cassiopeidae edit

Family Cepheidae edit

Suborder Daktyliophorae edit

Familu Catostylidae edit

Family Rhizostomatidae edit

Order Semaeostomeae edit

Family Cyaneidae edit

Family Pelagiidae edit

Family Ulmaridae edit

Class Staurozoa edit

Order Stauromedusae, suborder Cleistocarpida edit

Family Depastridae edit

Family Lipkeidae edit

Notes edit

References edit

  1. ^ a b c d e f g h i j k l m n o p q r s t u v w x y z aa ab ac ad ae af ag ah ai aj ak al am an ao ap aq ar as at au av aw ax ay az ba bb bc bd be bf bg bh bi bj bk bl bm bn bo bp bq br bs bt bu bv bw bx by bz ca cb cc cd ce cf cg ch ci cj ck cl cm cn co cp cq cr cs ct cu cv cw cx cy cz da db dc dd de df dg dh di dj dk dl dm dn do dp dq dr ds dt du dv Branch, G.M.; Branch, M.L.; Griffiths, C.L.; Beckley, L.E. (2010). Two Oceans: a guide to the marine life of southern Africa (2nd ed.). Cape Town: Struik Nature. ISBN 978 1 77007 772 0.
  2. ^ a b c d King, Dennis. 1996. Reef fishes and corals: East coast of southern Africa. Struik, Cape Town. ISBN 1 86825 981 1
  3. ^ a b c d e f g h i j k l m n o p q r s t u v w x y z aa ab ac ad ae af ag ah ai aj ak al am an ao ap aq ar as at au av aw ax ay az ba bb bc bd be bf bg bh bi bj bk bl bm bn bo bp bq br bs bt bu bv bw bx by bz ca cb cc cd ce cf cg ch Schleyer 2008, To be cited
  4. ^ a b Schleyer MH, Celliers L (2003) Biodiversity on the marginal coral reefs of South Africa: What does the future hold? Zool Ver 345:387–400
  5. ^ a b c d e f g h i j k l m n o p q r s t u v w x y z aa ab ac ad ae af ag ah ai aj ak Williams, Gary C. (1992). "The Alcyonacea of Southern Africa. Stoloniferous Octocorals and Soft Corals (Coelenterata, Anthozoa)". Annals of the South African Museum. 100 (3). ISSN 0303-2515.
  6. ^ McFadden, C.S. & L.P. van Ofwegen 2012. A revision of the soft coral genus, Eunephthya Verrill, 1869 (Anthozoa: Octocorallia: Nephtheidae), with a description of four new species from South Africa. Zootaxa 3485: 1-25
  7. ^ a b c d e f g h i j k l m n o p q r s t u v w x y z aa ab ac ad ae af ag ah ai aj ak al am an ao ap aq ar as at au av aw ax ay az ba Williams, Gary C. (July 1992). "The Alcyonacea of Southern Africa. Gorgonian Octocorals (Coelenterata. Anthozoa)". Annals of the South African Museum. 101 (8). ISSN 0303-2515.
  8. ^ a b c d e f g h i j k l m n o p q r s t u v w x y Williams, Gary C. (1990). "The Pennatulacea of Southern Africa (Coelentera, Anthozoa)". Annals of the South African Museum. 99 (4). ISSN 0303-2515.
  9. ^ a b c d e f g h i j k l m n o p q r s t u v w x y z aa ab ac ad ae af ag ah ai aj ak al am an ao ap aq ar as at au av aw ax ay az ba bb bc bd be bf bg bh bi bj bk bl bm bn bo bp bq br bs bt bu bv bw bx by bz ca cb cc cd ce cf cg ch ci cj ck cl cm cn co cp cq cr cs ct cu cv cw cx cy cz da db dc dd de df dg dh di dj dk dl dm dn do dp dq dr ds dt du dv dw dx dy dz ea eb ec ed ee ef eg eh ei ej ek el em en eo ep eq er es et eu ev ew ex ey ez fa fb fc fd fe ff fg fh fi fj fk fl fm fn fo fp fq fr fs ft fu fv fw fx fy fz ga gb gc gd ge gf gg gh gi gj gk gl gm gn go gp gq gr gs gt gu gv gw gx gy gz ha hb hc hd he hf hg hh hi hj hk hl hm hn ho hp hq hr hs ht hu hv hw hx Millard, N.A.H. (December 1975). "Monograph on the Hydroida of South Africa". Annals of the South African Museum. 68. ISSN 0303-2515.
  10. ^ a b c d e f g h i j Gibbons, Mark J. An introduction to the Zooplankton of the Benguela Current Region. ISBN 0 620 24225 6.
  11. ^ a b c d e f Jones, Georgina (2008). A field guide to the marine animals of the Cape Peninsula. Cape Town: SURG. ISBN 978-0-620-41639-9.