Between brackets is the number of accepted marine extant species
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Shows the number of accepted marine extant species within the taxon
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- Biota (247 559)
- Kingdom Animalia (211 523)
- Subkingdom Animalia incertae sedis
- Subkingdom Metazoa accepted as Animalia
- Phylum Acanthocephala (516)
- Phylum Annelida (14 107)
- Phylum Arthropoda (59 755)
- Phylum Aschelminthes
- Phylum Brachiopoda (408)
- Phylum Bryozoa (6 533)
- Phylum Cephalorhyncha
- Phylum Chaetognatha (132)
- Phylum Chordata (24 096)
- Phylum Cnidaria (12 578)
- Phylum Ctenophora (184)
- Phylum Cycliophora (2)
- Phylum Dicyemida (122)
- Phylum Echinodermata (7 646)
- Phylum Ectoprocta accepted as Bryozoa
- Phylum Entoprocta (202)
- Phylum Gastrotricha (523)
- Phylum Gnathostomulida (100)
- Phylum Hemichordata (137)
- Phylum Kinorhyncha (348)
- Phylum Loricifera (46)
- Phylum Mesozoa accepted as Dicyemida
- Phylum Mollusca (52 044)
- Subphylum Aculifera
- Subphylum Conchifera
- Subphylum Placophora accepted as Polyplacophora
- Superclass Aplacophora
- Class Amphineura accepted as Aculifera
- Class Bivalvia (8 543)
- Class Caudofoveata (143)
- Class Cephalopoda (859)
- Class Conchifera accepted as Bivalvia
- Class Gastropoda (40 485)
- Subclass Angiogastropoda represented as Gastropoda
- Subclass Apogastropoda
- Subclass Caenogastropoda (26 438)
- Subclass Gastropoda incertae sedis (1)
- Subclass Heterobranchia (8 998)
- Infraclass "Lower Heterobranchia" (378)
- Infraclass Euthyneura (8 541)
- Subterclass Acteonimorpha (246)
- Subterclass Ringipleura (2 827)
- Superorder Nudipleura (2 743)
- Order Notaspidea accepted as Pleurobranchomorpha
- Order Nudibranchia (2 651)
- Suborder Aeolidina accepted as Cladobranchia
- Suborder Anthobranchia accepted as Doridina
- Suborder Cladobranchia (1 092)
- Suborder Cladohepatica accepted as Cladobranchia
- Suborder Dexiarchia accepted as Cladobranchia
- Suborder Doridina (1 558)
- Infraorder Bathydoridoidei (8)
- Infraorder Doridoidei (1 550)
- Superfamily Chromodoridoidea Bergh, 1891 (482)
- Superfamily Doridoidea Rafinesque, 1815 (434)
- Superfamily Doridoidei incertae sedis
- Superfamily Onchidoridacea accepted as Onchidoridoidea Gray, 1827
- Superfamily Onchidoridoidea Gray, 1827 (278)
- Superfamily Phyllidioidea Rafinesque, 1814 (156)
- Superfamily Polyceroidea Alder & Hancock, 1845 (200)
- Family Gymnodorididae Odhner, 1941 accepted as Polycerinae Alder & Hancock, 1845
- Family Okadaiidae Baba, 1930 accepted as Okadaiinae Baba, 1930
- Family Polyceratidae Alder & Hancock, 1845 accepted as Polyceridae Alder & Hancock, 1845
- Family Polyceridae Alder & Hancock, 1845 (200)
- Subfamily Aegirinae P. Fischer, 1883 accepted as Aegiridae P. Fischer, 1883
- Subfamily Kalinginae Pruvot-Fol, 1956 (1)
- Subfamily Kankelibranchinae Ortea, Espinosa & Caballer, 2005 (2)
- Subfamily Nembrothinae Burn, 1967 (55)
- Subfamily Okadaiinae Baba, 1930 (4)
- Subfamily Polyceridae incertae sedis (1)
- Subfamily Polycerinae Alder & Hancock, 1845 (82)
- Subfamily Triophinae Odhner, 1941 (55)
- Genus Caloplocamus Thiele, 1931 accepted as Kaloplocamus Bergh, 1880
- Genus Colga Bergh, 1880 (3)
- Genus Crimora Alder & Hancock, 1862 (5)
- Genus Euphurus Rafinesque, 1815 accepted as Limacia O. F. Müller, 1781
- Genus Euplocamus R. A. Philippi, 1836 accepted as Kaloplocamus Bergh, 1880
- Genus Heteroplocamus W. R. B. Oliver, 1915 accepted as Kaloplocamus Bergh, 1880
- Genus Holoplocamus Odhner, 1926 (1)
- Species Holoplocamus papposus Odhner, 1926
- Genus Joubiniopsis Risbec, 1928 (1)
- Genus Kaloplocamus Bergh, 1880 (13)
- Genus Limacia O. F. Müller, 1781 (13)
- Genus Peplidia R. T. Lowe, 1842 accepted as Plocamopherus Rüppell & Leuckart, 1828
- Genus Plocamopherus Rüppell & Leuckart, 1828 (15)
- Genus Plocamophorus [sic] accepted as Plocamopherus Rüppell & Leuckart, 1828
- Genus Triopha Bergh, 1880 (4)
- Family Triophidae Odhner, 1941 accepted as Triophinae Odhner, 1941
- Infraorder Gnathodoridacea accepted as Bathydoridoidei
- Suborder Euctenidiacea accepted as Doridina
- Suborder Holohepatica accepted as Doridina
- Suborder Nudibranchia incertae sedis (1)
- Order Pleurobranchida (92)
- Genus Abranchus [sic] accepted as Abrancha van Hasselt, 1824
- Genus Spongiodoris Pruvot-Fol, 1933
- Superorder Ringiculimorpha (84)
- Order Pleurobranchomorpha accepted as Pleurobranchida
- Genus Abrancha van Hasselt, 1824
- Subterclass Tectipleura (5 468)
- Superorder Euthyneura incertae sedis
- Infraclass Heterobranchia incertae sedis
- Infraclass Mesoneura (79)
- Infraclass Opisthobranchia
- Infraclass Pulmonata
- Subclass Neomphaliones accepted as Vetigastropoda
- Subclass Neritimorpha (245)
- Subclass Orthogastropoda represented as Gastropoda
- Subclass Patellogastropoda (360)
- Subclass Prosobranchia
- Subclass Psilogastropoda represented as Gastropoda
- Subclass Vetigastropoda (4 443)
- Class Lamellibranchiata accepted as Bivalvia
- Class Loricata accepted as Polyplacophora
- Class Mollusca incertae sedis † (4)
- Class Monoplacophora (31)
- Class Pelecypoda accepted as Bivalvia
- Class Polyplacophora (1 085)
- Class Polyplaxiphora accepted as Polyplacophora
- Class Scaphopoda (581)
- Class Solenoconchia accepted as Scaphopoda
- Class Solenogastres (313)
- Subclass Chaetodermomorpha accepted as Caudofoveata
- Phylum Nematoda (6 758)
- Phylum Nematomorpha (5)
- Phylum Nemertea (1 334)
- Phylum Nemertina represented as Nemertea
- Phylum Nemertini accepted as Nemertea
- Phylum Orthonectida (24)
- Phylum Pentastomida accepted as Pentastomida
- Phylum Phoronida (13)
- Phylum Placozoa (4)
- Phylum Platyhelminthes (13 497)
- Phylum Pogonophora accepted as Siboglinidae Caullery, 1914
- Phylum Porifera (9 468)
- Phylum Priapulida (22)
- Phylum Rotatoria accepted as Rotifera
- Phylum Rotifera (219)
- Phylum Sipunculida accepted as Sipuncula
- Phylum Tardigrada (263)
- Phylum Xenacoelomorpha (437)
- Kingdom Archaea (117)
- Kingdom Bacteria (2 223)
- Kingdom Chromista (20 791)
- Kingdom Fungi (1 432)
- Kingdom Monera represented as Bacteria
- Kingdom Plantae (10 581)
- Kingdom Protozoa (766)
- Kingdom Viruses (115)
