Between brackets is the number of accepted species
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2 Shows the number of accepted species within the taxon
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- 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
- Family Amphilepidae accepted as Amphilepididae Matsumoto, 1915
- Family Amphilepididae Matsumoto, 1915
- Family Amphilimnidae O'Hara, Stöhr, Hugall, Thuy & Martynov, 2018
- Family Amphiuridae Ljungman, 1867
- Family Aplocomidae †
- Family Dermocomidae †
- Family Hemieuryalidae Verrill, 1899
- Family Ophiacanthidae Perrier, 1893
- Family Ophiactidae Matsumoto, 1915
- Family Ophiochitonidae Matsumoto, 1915
- Family Ophiocomidae Ljungman, 1867
- Family Ophiodermatidae Ljungman, 1867
- Family Ophiolepidae Ljungman, 1867 accepted as Ophiuridae Lyman, 1865
- Family Ophiolepididae Ljungman, 1867
- Family Ophioleucidae Matsumoto, 1915
- Family Ophiomusaidae O'Hara, Stöhr, Hugall, Thuy & Martynov, 2018
- Family Ophiomycetidae Verrill, 1899
- Family Ophionereididae Ljungman, 1867
- Family Ophiopyrgidae Perrier, 1893
- Family Ophiosphalmidae O'Hara, Stöhr, Hugall, Thuy & Martynov, 2018
- Family Ophiothricidae Ljungman, 1867 accepted as Ophiotrichidae Ljungman, 1867
- Family Ophiotrichidae Ljungman, 1867
- Family Ophiurida (awaiting allocation)
- Family Ophiuridae Lyman, 1865
- Genus Abyssura Belyaev & Litvinova, 1976
- Genus Anthophiura H.L. Clark, 1911
- Genus Aspidoura Gistl, 1848 † accepted as Aspiduriella Bolette, 1998 †
- Genus Aspidura Agassiz, 1835 † accepted as Aspiduriella Bolette, 1998 †
- Genus Aspiduriella Bolette, 1998 †
- Genus Asterites Blumenbach, 1803 † accepted as Aspidura Agassiz, 1835 †
- Genus Astrophiura Sladen, 1879
- Genus Bathylepta Belyaev & Litvinova, 1972
- Species Bathylepta pacifica Belyaev & Litvinova, 1972
- Genus Cholaster Worthen & Miller, 1883 †
- Genus Colaster Lindahl, 1890 † accepted as Cholaster Worthen & Miller, 1883 †
- Genus Dictenophiura H.L. Clark, 1923 accepted as Ophiura Lamarck, 1801
- Genus Eirenura Thuy, 2011 †
- Genus Felderophiura Jagt, 1991 †
- Genus Haplophiura Matsumoto, 1915
- Genus Hofmannistella Detre, 1971 †
- Genus Huangzhishania Chen, Shi & Kaiho, 2004 †
- Genus Hypusa Gistl, 1848 † accepted as Aspiduriella Bolette, 1998 †
- Genus Macarea Gistl, 1848 † accepted as Aspiduriella Bolette, 1998 †
- Genus Ophiambix Lyman, 1880
- Genus Ophiernus Lyman, 1878
- Genus Ophiglypha Zimmermann, 1907 accepted as Ophioglypha Lyman, 1860
- Genus Ophioceramis Lyman, 1865 accepted as Ophioplocus Lyman, 1862
- Genus Ophiochalcis Koehler, 1930
- Genus Ophiochorus H.L. Clark, 1939 accepted as Anthophiura H.L. Clark, 1911
- Genus Ophiochrysis Koehler, 1904
- Genus Ophiochytra Lyman, 1880
- Genus Ophiocirce Koehler, 1904 accepted as Ophioleuce Koehler, 1904
- Genus Ophiocircus accepted as Ophioleuce Koehler, 1904
- Genus Ophiocrates Koehler, 1904 accepted as Bathypectinura H.L. Clark, 1909
- Genus Ophiocrossota H.L. Clark, 1928
- Genus Ophiocten Lütken, 1855
- Genus Ophioctenella Tyler, Paterson, Sibuet, Guille, Murton & Segonzac, 1995
- Genus Ophioduplantiera Thuy, Numberger-Thuy & Pineda-Enríquez, 2021 †
- Genus Ophioelegans James, 1981 accepted as Ophiolepis Müller & Troschel, 1840
- Genus Ophioflocus Bell, 1884 accepted as Ophioplocus Lyman, 1862
- Genus Ophioglypa Delage & Hérouard, 1903 accepted as Ophioglypha Lyman, 1860
- Genus Ophioglypha Lyman, 1860 accepted as Ophiura Lamarck, 1801
- Genus Ophioglyphina Ludwig, 1886 accepted as Ophiura Lamarck, 1801
- Genus Ophioglypina Ludwig, 1886 accepted as Ophiura Lamarck, 1801
- Genus Ophiolebella Mortensen, 1936
- Genus Ophiolepidis Lütken, 1858 accepted as Ophiolepis Müller & Troschel, 1840
- Genus Ophioleuce Koehler, 1904
- Genus Ophiolypus Koehler, 1897
- Genus Ophiomartus Gregory in Lankester, 1900 accepted as Ophiomastus Lyman, 1878
- Genus Ophiomastus Lyman, 1878
- Genus Ophiomisidium Koehler, 1914
- Genus Ophionotus Bell, 1902
- Genus Ophiopallas Koehler, 1904
- Genus Ophiopenia H.L. Clark, 1911
- Genus Ophiophycis Koehler, 1901
- Genus Ophiopinna Hess, 1960 †
- Genus Ophiopleura Duncan, 1878
- Genus Ophioplypha Ludwig, 1899 accepted as Ophioglypha Lyman, 1860
- Genus Ophiopyren Lyman, 1878
- Genus Ophiopyrgoides H.L. Clark, 1939
- Genus Ophiostriatus Madsen, 1983
- Genus Ophiotitanos Spencer, 1907 †
- Genus Ophiotjalfa Mortensen, 1913
- Genus Ophiotylos Murakami, 1943 accepted as Ophiozonoida H.L. Clark, 1915
- Genus Ophiotypa Koehler, 1897
- Genus Ophiozea A.H. Clark, 1920 accepted as Ophiura Lamarck, 1801
- Genus Ophiozoea Koehler, 1924
- Genus Ophiura Lamarck, 1801
- Genus Ophiuraster H.L. Clark, 1939
- Genus Ophuira McClendon, 1909 accepted as Ophiura Lamarck, 1801
- Genus Ophyoglupha Clark, 1915 accepted as Ophioglypha Lyman, 1860
- Genus Ophyoglypha Lyman, 1871 accepted as Ophioglypha Lyman, 1860
- Genus Oppiomastus Clark, 1915 accepted as Ophiomastus Lyman, 1878
- Genus Perlophiura Belyaev & Litvinova, 1972
- Genus Praeaplocoma Broglio Loriga & Berti Cavicchi, 1972 †
- Genus Sinosura Hess, 1964 †
- Genus Syntomospina Morris, Rollins & Shaak, 1973 †
- Genus Uriopha Paterson, 1980
- Family Ophiurinidae Gregory, 1897 †
- Order Ophiuroidea (awaiting allocation)
- Order Phrynophiurida
- 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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