Between brackets is the number of accepted marine extant species
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- Biota (247 538)
- Kingdom Animalia (211 503)
- Subkingdom Animalia incertae sedis
- Subkingdom Metazoa accepted as Animalia
- Phylum Acanthocephala (516)
- Phylum Annelida (14 105)
- Phylum Arthropoda (59 754)
- Phylum Aschelminthes
- Phylum Brachiopoda (408)
- Phylum Bryozoa (6 539)
- Phylum Cephalorhyncha
- Phylum Chaetognatha (132)
- Phylum Chordata (24 095)
- Phylum Cnidaria (12 578)
- Phylum Ctenophora (184)
- Phylum Cycliophora (2)
- Phylum Dicyemida (122)
- Phylum Echinodermata (7 644)
- 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 (52 039)
- Subphylum Aculifera
- Subphylum Conchifera
- Subphylum Placophora accepted as Polyplacophora
- Superclass Aplacophora
- Class Amphineura accepted as Aculifera
- Class Bivalvia (8 541)
- Class Caudofoveata (143)
- Class Cephalopoda (859)
- Class Conchifera accepted as Bivalvia
- Class Gastropoda (40 482)
- Subclass Angiogastropoda represented as Gastropoda
- Subclass Apogastropoda
- Subclass Caenogastropoda (26 434)
- Subterclass Sorbeoconcha (1)
- Superorder Hypsogastropoda
- Order Architaenioglossa (1)
- Order Caenogastropoda incertae sedis (3 479)
- Order Littorinimorpha (7 115)
- Superfamily Calyptraeoidea Lamarck, 1809 (131)
- Superfamily Capuloidea J. Fleming, 1822 (164)
- Superfamily Cassoidea accepted as Tonnoidea Suter, 1913 (1825)
- Superfamily Cingulopsoidea Fretter & Patil, 1958 (179)
- Superfamily Crepiduloidea J. Fleming, 1822 accepted as Calyptraeoidea Lamarck, 1809
- Superfamily Cypraeoidea Rafinesque, 1815 (560)
- Superfamily Eulimoidea R. A. Philippi, 1853 accepted as Vanikoroidea Gray, 1840
- Superfamily Ficoidea Meek, 1864 (1840) (12)
- Superfamily Heteropoda Lamarck, 1812 accepted as Pterotracheoidea Rafinesque, 1814
- Superfamily Hipponicoidea Troschel, 1861 (56)
- Superfamily Littorinoidea Children, 1834 (237)
- Superfamily Naticoidea Guilding, 1834 (397)
- Superfamily Pterotracheoidea Rafinesque, 1814 (38)
- Superfamily Rissoacea accepted as Rissooidea Gray, 1847
- Superfamily Rissoinoidea W. Stimpson, 1865 accepted as Rissooidea Gray, 1847
- Superfamily Rissooidea Gray, 1847 (1 516)
- Superfamily Stromboidea Rafinesque, 1815 (195)
- Superfamily Tonnoidea Suter, 1913 (1825) (387)
- Family Aquillidae Pilsbry, 1904 accepted as Cymatiidae Iredale, 1913 (1854)
- Family Bursidae Thiele, 1925 (69)
- Genus Alanbeuella M. T. Sanders, Merle, Laurin, Bonillo & Puillandre, 2020 (1)
- Genus Annaperenna Iredale, 1936 (1)
- Genus Aspa H. Adams & A. Adams, 1853 (1)
- Genus Buffo Montfort, 1810 accepted as Marsupina Dall, 1904
- Genus Bufonaria Schumacher, 1817 (12)
- Genus Bufonariella Thiele, 1929 accepted as Talisman de Folin, 1887
- Genus Bursa Röding, 1798 (11)
- Subgenus Bursa (Aspa) H. Adams & A. Adams, 1853 accepted as Aspa H. Adams & A. Adams, 1853
- Subgenus Bursa (Bufonariella) Thiele, 1929 accepted as Talisman de Folin, 1887
- Subgenus Bursa (Chasmotheca) Dall, 1904 accepted as Chasmotheca Dall, 1904
- Subgenus Bursa (Colubrellina) P. Fischer, 1884 accepted as Bursa Röding, 1798
- Subgenus Bursa (Craspedotriton) Dall, 1904 accepted as Phyllocoma Tapparone Canefri, 1881
- Subgenus Bursa (Eupleura) H. Adams & A. Adams, 1853 accepted as Eupleura H. Adams & A. Adams, 1853
- Subgenus Bursa (Marsupina) Dall, 1904 accepted as Marsupina Dall, 1904
- Subgenus Bursa (Tutufa) Jousseaume, 1881 accepted as Tutufa Jousseaume, 1881
- Species Bursa affinis (Broderip, 1833) accepted as Dulcerana affinis (Broderip, 1833)
- Species Bursa alfredensis W. H. Turton, 1932 accepted as Dulcerana alfredensis (W. H. Turton, 1932)
- Species Bursa angioyorum Parth, 1990 accepted as Bursa lamarckii (Deshayes, 1853)
- Species Bursa asperrima Dunker, 1862
- Species Bursa awatii H. C. Ray, 1950 accepted as Korrigania awatii (H. C. Ray, 1950)
- Species Bursa barcellosi Matthews, Rios & Coelho, 1973 accepted as Ranella olearium (Linnaeus, 1758)
- Species Bursa benvegnuae Penna-Neme & Leme, 1978 accepted as Bursa ranelloides (Reeve, 1844)
- Species Bursa bergeri (Tapparone Canefri, 1881) accepted as Bursa rhodostoma (G. B. Sowerby II, 1835)
- Species Bursa bubo (Linnaeus, 1758) accepted as Tutufa bubo (Linnaeus, 1758)
- Species Bursa bufonia (Gmelin, 1791)
- Species Bursa caelata (Broderip, 1833) accepted as Alanbeuella corrugata (G. Perry, 1811)
- Species Bursa calcipicta Dall, 1908
- Species Bursa californica (Hinds, 1843) accepted as Crossata californica (Hinds, 1843)
- Species Bursa concinna Dunker, 1862 accepted as Gyrineum concinnum (Dunker, 1862)
- Species Bursa condita (Gmelin, 1791) accepted as Colubrellina condita (Gmelin, 1791)
- Species Bursa corrugata (Perry, 1811) accepted as Alanbeuella corrugata (G. Perry, 1811)
- Species Bursa crassa (Dillwyn, 1817) accepted as Marsupina bufo (Bruguière, 1792)
- Species Bursa cruentata (G. B. Sowerby II, 1835) accepted as Lampasopsis cruentata (G. B. Sowerby II, 1835)
- Species Bursa crumena (Lamarck, 1816) accepted as Bufonaria crumena (Lamarck, 1816)
- Species Bursa cubaniana (A. d'Orbigny, 1847) accepted as Dulcerana cubaniana (A. d'Orbigny, 1847)
- Species Bursa cumingiana Dunker, 1862 accepted as Bursa granularis (Röding, 1798)
- Species Bursa davidboschi Beu, 1987
- Species Bursa dunkeri Kira, 1959 accepted as Bursa bufonia (Gmelin, 1791)
- Species Bursa echinata (Link, 1807) accepted as Bufonaria echinata (Link, 1807)
- Species Bursa elisabettae Nappo, Pellegrini & Bonomolo, 2014 accepted as Dulcerana elisabettae (Nappo, Pellegrini & Bonomolo, 2014)
- Species Bursa fijiensis (R. B. Watson, 1881) accepted as Bursina fijiensis (R. B. Watson, 1881)
- Species Bursa finlayi McGinty, 1962 accepted as Bursa ranelloides (Reeve, 1844)
- Species Bursa fosteri Beu, 1987 accepted as Korrigania fosteri (Beu, 1987)
- Species Bursa fuscocostata Dunker, 1862 accepted as Gyrineum bituberculare (Lamarck, 1816)
- Species Bursa gibbosa Röding, 1798 accepted as Marsupina bufo (Bruguière, 1792)
- Species Bursa gnorima Melvill, 1918 accepted as Bursina gnorima (Melvill, 1918)
- Species Bursa granifera (Lamarck, 1816) accepted as Bursa granularis (Röding, 1798)
- Species Bursa granularis (Röding, 1798) accepted as Dulcerana granularis (Röding, 1798)
- Species Bursa grayana Dunker, 1862
- Species Bursa humilis Beu, 1981 accepted as Tritonoranella humilis (Beu, 1981)
- Species Bursa kowiensis W. H. Turton, 1932 accepted as Dulcerana kowiensis (W. H. Turton, 1932)
- Species Bursa lamarckii (Deshayes, 1853)
- Species Bursa lamarkii (Deshayes, 1853) accepted as Bursa lamarckii (Deshayes, 1853)
- Species Bursa lamellosa Dunker, 1863 accepted as Aspella producta (Pease, 1861)
- Species Bursa latitudo Garrard, 1961 accepted as Tritonoranella latitudo (Garrard, 1961)
- Species Bursa leo Shikama, 1964
- Species Bursa lissostoma E. A. Smith, 1914 accepted as Tutufa (Tutufa) bufo (Röding, 1798)
- Species Bursa livida (Reeve, 1844) accepted as Bursa affinis (Broderip, 1833)
- Species Bursa lucaensis Parth, 1991 accepted as Lampasopsis lucaensis (Parth, 1991)
- Species Bursa luteostoma (Pease, 1861)
- Species Bursa mammata Röding, 1798 accepted as Bursa bufonia (Gmelin, 1791)
- Species Bursa margaritula (Deshayes, 1833) accepted as Bursina margaritula (Deshayes, 1833)
- Species Bursa marginata (Gmelin, 1791) accepted as Aspa marginata (Gmelin, 1791)
- Species Bursa monitata Röding, 1798 accepted as Bursa bufonia (Gmelin, 1791)
- Species Bursa muehlhaeusseri Parth, 1990 accepted as Bursa lamarckii (Deshayes, 1853)
- Species Bursa natalensis Coelho & Matthews, 1970 accepted as Tritonoranella natalensis (Coelho & Matthews, 1970)
- Species Bursa nigrita (Mühlhäusser & Blöcher, 1979) accepted as Tutufa nigrita Mühlhäusser & Blöcher, 1979
- Species Bursa nobilis (Reeve, 1844) accepted as Bursina nobilis (Reeve, 1844)
- Species Bursa pacamoni Matthews & Coelho, 1971 accepted as Bursa grayana Dunker, 1862
- Species Bursa pustulosa (Reeve, 1844) accepted as Bursa corrugata (Perry, 1811)
- Species Bursa pygmaea Kosuge, 1979 accepted as Bursa ranelloides (Reeve, 1844)
- Species Bursa quirihorai Beu, 1987 accepted as Korrigania quirihorai (Beu, 1987)
- Species Bursa rana (Linnaeus, 1758) accepted as Bufonaria rana (Linnaeus, 1758)
- Species Bursa ranelloides (Reeve, 1844) accepted as Tritonoranella ranelloides (Reeve, 1844)
- Species Bursa rhodostoma (G. B. Sowerby II, 1835) accepted as Lampasopsis rhodostoma (G. B. Sowerby II, 1835)
- Species Bursa rosa (G. Perry, 1811)
- Species Bursa rubeta (Linnaeus, 1758) accepted as Tutufa rubeta (Linnaeus, 1758)
- Species Bursa rugosa (G. B. Sowerby II, 1835)
- Species Bursa scrobiculator [sic] accepted as Bursa scrobilator (Linnaeus, 1758)
- Species Bursa scrobilator (Linnaeus, 1758) accepted as Talisman scrobilator (Linnaeus, 1758)
- Species Bursa siphonata (Reeve, 1844) accepted as Bursa rosa (G. Perry, 1811)
- Species Bursa spinosa (Schumacher, 1817) accepted as Bufonaria echinata (Link, 1807)
- Species Bursa suensonii Mörch, 1852 accepted as Bufonaria echinata (Link, 1807)
- Species Bursa tenuigranosa E. A. Smith, 1914 accepted as Tutufa tenuigranosa (E. A. Smith, 1914)
- Species Bursa tenuisculpta Dautzenberg & H. Fischer, 1906 accepted as Bursa ranelloides (Reeve, 1844)
- Species Bursa thersites (Redfield, 1846) accepted as Bufonaria thersites (Redfield, 1846)
- Species Bursa thomae (A. d'Orbigny, 1847) accepted as Lampasopsis thomae (A. d'Orbigny, 1853)
- Species Bursa tuberculata (Broderip, 1833) accepted as Gyrineum natator (Röding, 1798)
- Species Bursa tuberosissima (Reeve, 1844)
- Species Bursa tumida Dunker, 1862 accepted as Argobuccinum tumidum (Dunker, 1862)
- Species Bursa venustula (Reeve, 1844) accepted as Bursa rhodostoma (G. B. Sowerby II, 1835)
- Species Bursa verrucosa (G. B. Sowerby I, 1825) accepted as Annaperenna verrucosa (G. B. Sowerby I, 1825)
- Genus Bursina Oyama, 1964 (6)
- Genus Chasmotheca Dall, 1904 accepted as Bufonaria Schumacher, 1817
- Genus Colubrellina P. Fischer, 1884 (1)
- Genus Columbraria accepted as Bursa Röding, 1798
- Genus Crossata Jousseaume, 1881 (3)
- Genus Dulcerana Oyama, 1964 (4)
- Genus Korrigania M. T. Sanders, Merle, Laurin, Bonillo & Puillandre, 2020 (5)
- Genus Lampadopsis P. Fischer, 1884 accepted as Lampasopsis Jousseaume, 1881
- Genus Lampas Schumacher, 1817 accepted as Tutufa (Tutufella) Beu, 1981
- Genus Lampasopsis Jousseaume, 1881 (4)
- Genus Marsupina Dall, 1904 (2)
- Genus Pseudobursa Rovereto, 1899 accepted as Bursa Röding, 1798
- Genus Talisman de Folin, 1887 (1)
- Genus Tritonoranella Oyama, 1964 (4)
- Genus Tutufa Jousseaume, 1881 (13)
- Genus Tutufella Beu, 1981 accepted as Tutufa (Tutufella) Beu, 1981
- Family Calcarellidae Schaufuss, 1869 accepted as Personidae Gray, 1854
- Family Cassidae Latreille, 1825 (101)
- Family Charoniidae A. W. B. Powell, 1933 (5)
- Family Cymatiidae Iredale, 1913 (1854) (138)
- Family Galeodoliidae Sacco, 1891 accepted as Tonnidae Suter, 1913 (1825)
- Family Lampusiidae R. B. Newton, 1891 accepted as Cymatiidae Iredale, 1913 (1854)
- Family Laubierinidae Warén & Bouchet, 1990 (5)
- Family Lotoriidae G. F. Harris, 1897 accepted as Cymatiidae Iredale, 1913 (1854)
- Family Macgillivrayiidae H. Adams & A. Adams, 1854 accepted as Tonnidae Suter, 1913 (1825)
- Family Nyctilochidae Dall, 1912 accepted as Cymatiidae Iredale, 1913 (1854)
- Family Oocorythidae P. Fischer, 1885 accepted as Cassidae Latreille, 1825
- Family Personidae Gray, 1854 (24)
- Family Ranellidae Gray, 1854 (5)
- Family Septidae Dall & C. T. Simpson, 1901 accepted as Cymatiidae Iredale, 1913 (1854)
- Family Simpulidae Dautzenberg, 1900 accepted as Cymatiidae Iredale, 1913 (1854)
- Family Thalassocyonidae F. Riedel, 1995 (5)
- Family Tonnidae Suter, 1913 (1825) (35)
- Family Tritoniidae H. Adams & A. Adams, 1853 accepted as Ranellidae Gray, 1854
- Subfamily Personinae Gray, 1854 accepted as Personidae Gray, 1854
- Superfamily Truncatelloidea J. E. Gray, 1840 (1 519)
- Superfamily Vanikoroidea Gray, 1840 (1 117)
- Superfamily Velutinoidea Gray, 1840 (466)
- Superfamily Vermetoidea Rafinesque, 1815 (141)
- Superfamily Xenophoroidea Troschel, 1852 (1840) accepted as Stromboidea Rafinesque, 1815
- Order Neogastropoda (15 838)
- Order Stenoglossa accepted as Neogastropoda
- Subclass Gastropoda incertae sedis (1)
- Subclass Heterobranchia (8 999)
- 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 (1 332)
- 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 (13 493)
- Phylum Pogonophora accepted as Siboglinidae Caullery, 1914
- Phylum Porifera (9 470)
- Phylum Priapulida (22)
- Phylum Rotatoria accepted as Rotifera
- Phylum Rotifera (208)
- Phylum Sipunculida accepted as Sipuncula
- Phylum Tardigrada (263)
- Phylum Xenacoelomorpha (437)
- Kingdom Archaea (117)
- Kingdom Bacteria (2 223)
- Kingdom Chromista (20 790)
- Kingdom Fungi (1 432)
- Kingdom Monera represented as Bacteria
- Kingdom Plantae (10 581)
- Kingdom Protozoa (766)
- Kingdom Viruses (115)
