Between brackets is the number of accepted species
1 Click on "-" to collapse/hide all child taxa
2 Shows the number of accepted species within the taxon
3 The last expanded taxon is highlighted
4 Click on "+" to expand/show all child taxa
5 Click to see the taxon details page
- Biota
- Kingdom Animalia
- Phylum Acanthocephala
- Phylum Agmata †
- Phylum Animalia (awaiting allocation)
- Phylum Animalia incertae sedis
- Phylum Annelida
- Phylum Arthropoda
- Phylum Brachiopoda
- Phylum Bryozoa
- Phylum Cephalorhyncha incertae sedis
- Phylum Chaetognatha
- Phylum Chitinozoa †
- Phylum Chordata
- Phylum Cnidaria
- Phylum Ctenophora
- Phylum Cycliophora
- Phylum Cycloneuralia incertae sedis
- Phylum Ecdysozoa incertae sedis †
- Phylum Echinodermata
- Class Asteroidea
- Class Asterozoa (awaiting allocation)
- Class Blastoidea †
- Class Cornuta
- Class Coronata
- Class Coronoidea †
- Class Crinoidea
- Class Ctenocystoidea †
- Class Cystoidea
- Class Diploporita †
- Class Echinodermata (awaiting allocation)
- Class Echinodermata incertae sedis
- Class Echinoidea
- Class Edrioasteroidea †
- Class Edrioblastoidea †
- Class Eocrinoidea †
- Class Helicoplacoidea †
- Class Holothuroidea
- Class Homoiostelea †
- Class Homostelea †
- Class Ophiocistioidea †
- Class Ophiuroidea
- Order Euryalida
- Order Gnathophiurina
- Order Oegophiurida
- Order Ophiacanthida
- Order Ophioscolecida
- Order Ophiurida
- Order Ophiuroidea (awaiting allocation)
- Order Phrynophiurida
- Family Asteronychidae Ljungman, 1867
- Family Asteroschematidae Verrill, 1899
- Family Astrochelidae Verrill, 1899 accepted as Gorgonocephalidae Ljungman, 1867
- Family Astrophytidae accepted as Gorgonocephalidae Ljungman, 1867
- Family Eospondylidae Spencer & Wright, 1966 †
- Family Euryalidae Gray, 1840
- Family Gorgonocephalidae Ljungman, 1867
- Family Onychasteridae Miller, 1889 †
- Family Ophiomyxidae Ljungman, 1867
- Genus Astrogymnotes H.L. Clark, 1914
- Genus Neoplax Bell, 1884
- Genus Ophimyxa Zimmermann, 1907 accepted as Ophiomyxa Müller & Troschel, 1840
- Genus Ophioblenna Lütken, 1859
- Genus Ophiobrachion Lyman, 1883
- Genus Ophiobursa Haeckel, 1896 accepted as Ophiobyrsa Lyman, 1878
- Genus Ophiobyrsa Lyman, 1878
- Genus Ophiobyrsella Verrill, 1899
- Species Ophiobyrsella erinaceus Koehler, 1904
- Species Ophiobyrsella hystricis (Lyman, 1883) accepted as Ophiophrixus spinosus (Storm, 1881)
- Species Ophiobyrsella intorta Koehler, 1922 accepted as Ophiobyrsa intorta (Koehler, 1922)
- Species Ophiobyrsella quadrispinosa Koehler, 1914 accepted as Ophiophrixus quadrispinosus (Koehler, 1914)
- Species Ophiobyrsella serpens (Lyman, 1878)
- Genus Ophiocanops Koehler, 1922
- Genus Ophiodera Verrill, 1899 accepted as Ophiomyxa Müller & Troschel, 1840
- Genus Ophiodora Koehler, 1904
- Genus Ophiomora Koehler, 1907
- Genus Ophiomyxa Müller & Troschel, 1840
- Genus Ophiophrixus H.L. Clark, 1911
- Genus Ophiophryxus Clark, 1915 accepted as Ophiophrixus H.L. Clark, 1911
- Genus Ophioschiza H.L. Clark, 1911
- Genus Ophiosciasma Lyman, 1878
- Genus Ophiosmilax Matsumoto, 1915
- Genus Ophiostiba Matsumoto, 1915
- Genus Ophiostyracium H.L. Clark, 1911
- Genus Ophiothrixus accepted as Ophiophrixus H.L. Clark, 1911
- Genus Ophiovesta Koehler, 1930 accepted as Astrogymnotes H.L. Clark, 1914
- Genus Renetheo McKnight, 2003 accepted as Ophiocanops Koehler, 1922
- Order Stenurida †
- Family Componasteridae Glass, Blake & Lefebvre, 2024 †
- Genus Maydena Jell, 2014 † accepted as Maydenaster Jell, 2020 †
- Genus Maydenaster Jell, 2020 †
- Genus Muldaster Thuy, Eriksson & Numberger-Thuy in Thuy et al., 2022 †
- Genus Ophiobartia Loba in Loba & Radwańska, 2022 †
- Genus Ophiolofsson Thuy, Eriksson, Kutscher & Numberger-Thuy, 2024 †
- Genus Ophiopetagno Thuy, Eriksson & Numberger-Thuy in Thuy et al., 2022 †
- Genus Ophiosuperstes Thuy, Maxwell & Pruss, 2021 †
- Genus Triadoleucella Ishida et al., 2022 †
- Class Parablastoidea †
- Class Paracrinoidea †
- Class Rhombifera †
- Class Somasteroidea
- Class Stelleroidea
- Class Stylophora †
- Genus Anadema Meuschen, 1787
- Genus Artocrea Meuschen, 1787
- Genus Birita Meuschen, 1787
- Genus Disci-transfixus Meuschen, 1787
- Genus Galea Meuschen, 1787
- Genus Olivaeformis Meuschen, 1787
- Genus Stribilita Meuschen, 1787
- Phylum Entoprocta
- Phylum Gastrotricha
- Phylum Gnathostomulida
- Phylum Hemichordata
- Phylum Hyolitha †
- Phylum Kinorhyncha
- Phylum Lobopoda †
- Phylum Loricifera
- Phylum Micrognathozoa
- Phylum Mollusca
- Phylum Monoblastozoa accepted as Animalia incertae sedis
- Phylum Nematoda
- Phylum Nematomorpha
- Phylum Nemertea
- Phylum Onychophora
- Phylum Orthonectida
- Phylum Phoronida
- Phylum Placozoa
- Phylum Platyhelminthes
- Phylum Pogonophora accepted as Siboglinidae Caullery, 1914
- Phylum Porifera
- Phylum Priapula accepted as Priapulida
- Phylum Priapulida
- Phylum Problematica † accepted as Animalia incertae sedis
- Phylum Rhombozoa
- Phylum Rotifera
- Phylum Scalidophora incertae sedis
- Phylum Sipuncula
- Phylum Tardigrada
- Phylum Trace fossils †
- Phylum Vendobionta †
- Phylum Vestimentifera accepted as Siboglinidae Caullery, 1914
- Phylum Vetulicolia †
- Phylum Vinctiplicata incertae sedis †
- Phylum Xenacoelomorpha
- Genus Trilobocaris Pribyl, 1953 †
- Kingdom Archaea
- Kingdom Bacteria
- Kingdom Chromista
- Kingdom Fungi
- Kingdom Plantae
- Kingdom Protista accepted as Protozoa
- Kingdom Protozoa
- Kingdom Viruses
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