Between brackets is the number of accepted marine extant species
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- Biota (247 559)
- Kingdom Animalia (211 524)
- Subkingdom Animalia incertae sedis
- Subkingdom Metazoa accepted as Animalia
- Phylum Acanthocephala (516)
- Phylum Annelida (14 107)
- Phylum Arthropoda (59 759)
- 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 (52 038)
- Subphylum Aculifera
- Subphylum Conchifera
- Subphylum Placophora accepted as Polyplacophora
- Superclass Aplacophora
- Class Amphineura accepted as Aculifera
- Class Bivalvia (8 540)
- Class Caudofoveata (143)
- Class Cephalopoda (859)
- Class Conchifera accepted as Bivalvia
- Class Gastropoda (40 482)
- Subclass Angiogastropoda represented as Gastropoda
- Subclass Apogastropoda
- Subclass Caenogastropoda (26 435)
- Subclass Gastropoda incertae sedis (1)
- Subclass Heterobranchia (8 998)
- Infraclass "Lower Heterobranchia" (378)
- Infraclass Euthyneura (8 541)
- Subterclass Acteonimorpha (246)
- Subterclass Ringipleura (2 827)
- Subterclass Tectipleura (5 468)
- Superorder Acochlidiimorpha (38)
- Superorder Ascoglossa accepted as Sacoglossa
- Superorder Basommatophora accepted as Hygrophila
- Superorder Eupulmonata (287)
- Superorder Hygrophila (4)
- Superorder Pneumopulmonata
- Superorder Pylopulmonata (3 457)
- Superfamily Amphiboloidea Gray, 1840 (11)
- Superfamily Pyramidelloidea J. E. Gray, 1840 (3 446)
- Family Amathinidae Ponder, 1987 (56)
- Family Anisocyclidae van Aartsen, 1995 accepted as Eulimellini Saurin, 1958
- Family Pyramidellidae J. E. Gray, 1840 (3 388)
- Subfamily Cyclostremellinae D. R. Moore, 1966 (2)
- Subfamily Microstellariinae Raven & Moolenbeek, 2024 (1)
- Subfamily Odostomiinae Pelseneer, 1928
- Subfamily Pyramidellinae (24)
- Subfamily Syrnolinae Saurin, 1958
- Subfamily Turbonillinae Bronn, 1849 (1 576)
- Genus Aartsenia Warén, 1991 (6)
- Genus Actaeopyramis P. Fischer, 1885 accepted as Monotygma G. B. Sowerby II, 1839
- Genus Afroturbonilla Peñas, Rolán & Schander, 1999 (3)
- Genus Agatha A. Adams, 1860 (17)
- Genus Amathis A. Adams, 1861 accepted as Agatha A. Adams, 1860 (1)
- Genus Amoura [sic] accepted as Amaura Møller, 1842
- Genus Anisocycla Monterosato, 1880 accepted as Eulimella Forbes & M'Andrew, 1846 (1)
- Genus Aphalista Laseron, 1959 accepted as Otopleura P. Fischer, 1885
- Genus Auriculina J. E. Gray, 1847 accepted as Ondina de Folin, 1870
- Genus Auristomia Monterosato, 1884 (6)
- Genus Babella Dall & Bartsch, 1906 (23)
- Genus Bacteridium Thiele, 1929 (4)
- Genus Besla Dall & Bartsch, 1904 (25)
- Genus Boonea R. Robertson, 1978 (13)
- Genus Brachystomia Monterosato, 1884 (15)
- Genus Bulicingulina Robba, 2013
- Genus Bulimoscilla Robba, 2013 (1)
- Genus Burkillia Iredale, 1915 accepted as Tragula Monterosato, 1884
- Genus Chrysallida P. P. Carpenter, 1856 (98)
- Genus Cimaria Høisæter, 2012 (1)
- Genus Cinctiuga Laseron, 1951 (1)
- Genus Cingulina A. Adams, 1860 (24)
- Subgenus Cingulina (Careliopsis) Mörch, 1875 accepted as Careliopsis Mörch, 1875
- Subgenus Cingulina (Odetta) de Folin, 1870 accepted as Odetta de Folin, 1870
- Species Cingulina (Odetta) appeliusi Hornung & Mermod, 1925 accepted as Oscilla appeliusi (Hornung & Mermod, 1925)
- Species Cingulina (Odetta) beccarii Hornung & Mermod, 1924 accepted as Oscilla beccarii (Hornung & Mermod, 1924)
- Species Cingulina (Odetta) bellardii Hornung & Mermod, 1924 accepted as Oscilla bellardii (Hornung & Mermod, 1924)
- Species Cingulina (Odetta) nodulosa Hornung & Mermod, 1924
- Species Cingulina acutilirata G. B. Sowerby III, 1892
- Species Cingulina aglaia (Bartsch, 1915) accepted as Polyspirella aglaia (Bartsch, 1915)
- Species Cingulina aikeni Poppe, Tagaro & Goto, 2018
- Species Cingulina archimedea Melvill, 1896
- Species Cingulina australis Tenison Woods, 1876 accepted as Lironoba australis (Tenison Woods, 1876)
- Species Cingulina austrina Laseron, 1959
- Species Cingulina babylonia (C. B. Adams, 1845) accepted as Pseudoscilla babylonia (C. B. Adams, 1845)
- Species Cingulina biarata Nomura, 1937 accepted as Pseudocingulina triarata (Pilsbry, 1904)
- Species Cingulina boirai J. D. Oliver, Swinnen & Rolán, 2023
- Species Cingulina brazieri Angas, 1877
- Species Cingulina callista (Bartsch, 1915) accepted as Polyspirella callista (Bartsch, 1915)
- Species Cingulina carinata Mörch, 1876 accepted as Pyramidelloides carinatus (Mörch, 1876)
- Species Cingulina cingulata (Dunker, 1860)
- Species Cingulina circinata A. Adams, 1860
- Species Cingulina densistriata Nomura, 1936 accepted as Murchisonella densistriata (Nomura, 1936)
- Species Cingulina diaphana Verco, 1906 accepted as Cinctiuga diaphana (Verco, 1906)
- Species Cingulina dussaulti Saurin, 1962
- Species Cingulina evermanni (F. Baker, G. D. Hanna & A. M. Strong, 1928) accepted as Murchisonella evermanni (F. Baker, G. D. Hanna & A. M. Strong, 1928)
- Species Cingulina imperita Laseron, 1959
- Species Cingulina inaequalis Saurin, 1958
- Species Cingulina inamuragasakiensis Nomura, 1938
- Species Cingulina inequicingulata Nomura, 1938 accepted as Pseudocingulina inequicingulata (Nomura, 1938)
- Species Cingulina insignis May, 1911 accepted as Seila insignis (May, 1911)
- Species Cingulina isseli (Tryon, 1886)
- Species Cingulina japonica Clessin, 1902
- Species Cingulina laticingula (Dall & Bartsch, 1906)
- Species Cingulina laticingulata [sic] accepted as Cingulina laticingula (Dall & Bartsch, 1906)
- Species Cingulina magna Gatliff & Gabriel, 1910
- Species Cingulina mutuwanensis Nomura, 1938 accepted as Cingulina cingulata (Dunker, 1860)
- Species Cingulina onzikuensis Nomura, 1938 accepted as Pseudocingulina onzikuensis (Nomura, 1938)
- Species Cingulina pulchra (Brazier, 1894)
- Species Cingulina puncticingulata Nomura, 1938
- Species Cingulina quatericingulata Nomura, 1938 accepted as Pseudocingulina quatericingulata (Nomura, 1938)
- Species Cingulina rhyllensis Gatliff & Gabriel, 1910
- Species Cingulina rugosa Saurin, 1959
- Species Cingulina secernenda Melvill, 1918
- Species Cingulina spina (Crosse & P. Fischer, 1864)
- Species Cingulina subulata Clessin, 1902
- Species Cingulina superba Thiele, 1925
- Species Cingulina terebra (Dunker, 1860) accepted as Pseudocingulina terebra (Dunker, 1860)
- Species Cingulina torcularis Tenison Woods, 1878 accepted as Icuncula torcularis (Tenison Woods, 1878)
- Species Cingulina trachealis (A. Gould, 1861) accepted as Polyspirella trachealis (A. Gould, 1861)
- Species Cingulina trilineata Clessin, 1902
- Species Cingulina trisulcata G. B. Sowerby III, 1894
- Species Cingulina truncata Saurin, 1959
- Species Cingulina urdeneta (Bartsch, 1917) accepted as Turbonilla urdeneta Bartsch, 1917
- Genus Contraxiala Laseron, 1956 accepted as Pyrgulina A. Adams, 1863
- Genus Cossmannica Dall & Bartsch, 1904 (9)
- Genus Costabieta Laseron, 1956 (5)
- Genus Costosyrnola Laws, 1937 (8)
- Genus Cremula Iredale, 1915 accepted as Liostomia G. O. Sars, 1878
- Genus Cyclodostomia Sacco, 1892 accepted as Odostomia J. Fleming, 1813
- Genus Derjuginella Habe, 1958 (1)
- Genus Digoniaxis Jousseaume, 1889 (1)
- Genus Doliella Monterosato, 1880 (1)
- Genus Dunkeria P. P. Carpenter, 1857 accepted as Turbonilla Risso, 1826 (1)
- Genus Egila Dall & Bartsch, 1904 (7)
- Genus Egilina Dall & Bartsch, 1906 (10)
- Genus Elodia de Folin, 1870 accepted as Parthenina Bucquoy, Dautzenberg & Dollfus, 1883
- Genus Elodiamea de Folin, 1886 accepted as Parthenina Bucquoy, Dautzenberg & Dollfus, 1883 (4)
- Genus Elusa A. Adams, 1861 accepted as Tropaeas Dall & Bartsch, 1904 (1)
- Genus Eulimastoma Bartsch, 1916 (8)
- Genus Euparthenia Thiele, 1929 (2)
- Genus Eupyrgulina Melvill, 1910 accepted as Pyrgulina A. Adams, 1863
- Genus Eurathea Laseron, 1959 (3)
- Genus Evalea A. Adams, 1860 (17)
- Genus Fargoa Bartsch, 1955 (7)
- Genus Finlayola Laws, 1937 (1)
- Genus Folinella Dall & Bartsch, 1904 (5)
- Genus Funicularia Monterosato, 1884 accepted as Ividella Dall & Bartsch, 1909
- Genus Globostomia L. Hoffman, van Heugten & Lavaleye, 2009 (1)
- Genus Gumina H. J. Finlay, 1928 (2)
- Genus Gurmatia Dance & Eames, 1966 (2)
- Genus Helodiamea Peñas & Rolán, 2017 (11)
- Genus Herewardia Iredale, 1955 (3)
- Genus Herviera Melvill & Standen, 1899 (3)
- Genus Hinemoa W. R. B. Oliver, 1915 accepted as Oscilla A. Adams, 1861
- Genus Houbricka J. B. Wise, 1996 (1)
- Genus Iolaea A. Adams, 1867 (9)
- Genus Ivara Arnold, 1903 (2)
- Genus Ividella Dall & Bartsch, 1909 (10)
- Genus Ividia Dall & Bartsch, 1904 (3)
- Genus Jaminea de Folin, 1870 accepted as Pseudoscilla O. Boettger, 1902
- Genus Jaminia T. Brown, 1827 accepted as Parthenina Bucquoy, Dautzenberg & Dollfus, 1883
- Genus Jole [sic] accepted as Iole A. Adams, 1860
- Genus Jordaniella Chaster, 1898 (2)
- Genus Jordanula Chaster, 1901 accepted as Jordaniella Chaster, 1898
- Genus Kejdonia Mifsud, 1999 (1)
- Genus Kongsrudia Lygre & Schander, 2010 (5)
- Genus Kunopia Laseron, 1959 (1)
- Genus Lafolletteia Landau & Micali, 2021 (1)
- Genus Latavia Laseron, 1951 (2)
- Genus Lia de Folin, 1873 accepted as Liamorpha Pilsbry, 1898
- Genus Liamorpha Pilsbry, 1898 (3)
- Genus Linopyrga Laws, 1941 (19)
- Genus Liomorpha accepted as Liamorpha Pilsbry, 1898
- Genus Liostomia G. O. Sars, 1878 (12)
- Genus Liotropica Laseron, 1958 accepted as Moerchia A. Adams, 1860
- Genus Longchaeus Mörch, 1875 (20)
- Genus Marginodostomia Nomura, 1936 (7)
- Genus Maricarmenia Peñas & Rolán, 2017 (1)
- Genus Megastomia Monterosato, 1884 (69)
- Genus Menesthella Nomura, 1939 (2)
- Genus Menestho Møller, 1842 (20)
- Genus Milda Dall & Bartsch, 1904 (4)
- Genus Miralda A. Adams, 1863 (44)
- Genus Miraldiella Cossmann, 1921 accepted as Pseudoscilla O. Boettger, 1902
- Genus Moerchia A. Adams, 1860 (6)
- Genus Moerchiella Thiele, 1924 accepted as Moerchia A. Adams, 1860
- Genus Monoptygma Lea, 1833 sensu A. Adams, 1853 accepted as Monotygma G. B. Sowerby II, 1839
- Genus Morchia [sic] accepted as Moerchia A. Adams, 1860
- Genus Mormula A. Adams, 1863 (13)
- Genus Mormulasta Laseron, 1959 (1)
- Genus Morrisonietta Brandt, 1968 (6)
- Genus Mulderia Landau & Micali, 2021 (1)
- Genus Mumiola A. Adams, 1863 (10)
- Genus Myxa Hedley, 1903 (1)
- Genus Nesiodostomia Pilsbry, 1918 (3)
- Genus Noemia de Folin, 1870 accepted as Noemiamea de Folin, 1886
- Genus Noemiamea de Folin, 1886 (9)
- Genus Numaegilina Nomura, 1938 accepted as Babella Dall & Bartsch, 1906
- Genus Obeliscus J. E. Gray, 1847 accepted as Pyramidella Lamarck, 1799
- Genus Obex Laws, 1940 accepted as Obexomia Laws, 1941
- Genus Obexomia Laws, 1941 (1)
- Genus Oda Monterosato, 1901 accepted as Noemiamea de Folin, 1886
- Genus Odetta de Folin, 1870 (10)
- Genus Odontostomia Jeffreys, 1839 accepted as Odostomia J. Fleming, 1813
- Genus Odontostomiella Cossmann, 1921 accepted as Odostomella Bucquoy, Dautzenberg & Dollfus, 1883
- Genus Odostomella Bucquoy, Dautzenberg & Dollfus, 1883 (17)
- Genus Odostomia J. Fleming, 1813 (482)
- Genus Ondina de Folin, 1870 (22)
- Genus Oopyramis Thiele, 1930 (1)
- Genus Orina A. Adams, 1870 accepted as Orinella Dall & Bartsch, 1904
- Genus Orinella Dall & Bartsch, 1904
- Genus Oscilla A. Adams, 1861 (63)
- Genus Otopleura P. Fischer, 1885 (4)
- Genus Ovalina Peñas & Rolán, 2017 (6)
- Genus Paracingulina Nomura, 1936 accepted as Pseudocingulina Nomura, 1936
- Genus Paradoxella Laseron, 1959 (1)
- Genus Paramormula Nomura, 1939 accepted as Turbonilla Risso, 1826
- Genus Paregila Laseron, 1951 accepted as Babella Dall & Bartsch, 1906 (1)
- Genus Parodizia Medina, 1959 (1)
- Genus Parodostomia Laseron, 1959 (3)
- Genus Parthenia R. T. Lowe, 1841 accepted as Euparthenia Thiele, 1929
- Genus Parthenina Bucquoy, Dautzenberg & Dollfus, 1883 (114)
- Genus Partulida Schaufuss, 1869 accepted as Spiralina Chaster, 1898
- Genus Perheida Peñas & Rolán, 2017 (1)
- Genus Peristichia Dall, 1889 (7)
- Genus Perparthenina F. Nordsieck, 1972 accepted as Parthenina Bucquoy, Dautzenberg & Dollfus, 1883
- Genus Petitella J. B. Wise, 1996 accepted as Petitilla J. B. Wise, 1997
- Genus Petitilla J. B. Wise, 1997 (1)
- Genus Pharcidella Dall, 1889 accepted as Longchaeus Mörch, 1875
- Genus Phasianema S. V. Wood, 1842 (2)
- Genus Planpyrgiscus Laws, 1937 (1)
- Genus Plotia Röding, 1798 accepted as Pyramidella Lamarck, 1799
- Genus Polemicella Schander, van Aartsen & Corgan, 1999 (5)
- Genus Polyspirella P. P. Carpenter, 1861 (4)
- Genus Pseudocingulina Nomura, 1936 (5)
- Genus Pseudographis Mifsud, 1998 accepted as Kejdonia Mifsud, 1999
- Genus Pseudorissoina Tate & May, 1900 (6)
- Genus Pseudoscilla O. Boettger, 1902 (8)
- Genus Pseudoskenella Ponder, 1974 (1)
- Genus Ptycheulimella Sacco, 1892 (7)
- Genus Pyrabinella Faber, 2013 (1)
- Genus Pyramidellidae incertae sedis (1)
- Genus Pyramis T. Brown, 1827 accepted as Onoba H. Adams & A. Adams, 1852
- Genus Pyramistomia Cossmann, 1921
- Genus Pyrgisculus Monterosato, 1884 (1)
- Genus Pyrgolampros Sacco, 1892 accepted as Turbonilla Risso, 1826
- Genus Pyrgulina A. Adams, 1863 (187)
- Genus Quirella Laseron, 1959 (16)
- Genus Rissopsetia Dell, 1956 (19)
- Genus Rissosyrnola Nomura, 1939 (1)
- Genus Rugadentia Laseron, 1951 (4)
- Genus Salassia de Folin, 1870 (5)
- Genus Salassiella Dall & Bartsch, 1909 accepted as Trabecula Monterosato, 1884
- Genus Sayella Dall, 1885 (6)
- Genus Sinuatodostomia Nomura, 1937 (4)
- Genus Siogamaia Nomura, 1936 (15)
- Genus Siogamia [sic] accepted as Siogamaia Nomura, 1936
- Genus Spiralina Chaster, 1898 (5)
- Genus Spiralinella Chaster, 1901 accepted as Spiralina Chaster, 1898
- Genus Standeniella Saurin, 1958 accepted as Pyrgulina A. Adams, 1863
- Genus Stomega Dall & Bartsch, 1904 accepted as Megastomia Monterosato, 1884
- Genus Streptocionella Pfeffer, 1886 (2)
- Genus Striarcana Laws, 1937 accepted as Turbonilla Risso, 1826 (1)
- Genus Striodostomia Laws, 1940 (2)
- Genus Strioturbonilla Sacco, 1892 (2)
- Genus Stylopsis A. Adams, 1860 (5)
- Genus Styloptygma A. Adams, 1860 (20)
- Genus Stylopyramis Thiele, 1929
- Genus Sulcoturbonilla Sacco, 1892
- Genus Tathrella Laseron, 1959 (1)
- Genus Telloda Hertlein & A. M. Strong, 1951 accepted as Eulimastoma Bartsch, 1916
- Genus Terelimella Laws, 1938 (3)
- Genus Tiberia Jeffreys, 1884 (24)
- Genus Tiberia Monterosato, 1875 accepted as Tiberia Jeffreys, 1884
- Genus Tiberiella Coen, 1933 accepted as Parthenina Bucquoy, Dautzenberg & Dollfus, 1883
- Genus Tiberiola Cossmann, 1900 accepted as Tiberia Jeffreys, 1884
- Genus Tibersyrnola Laws, 1937 (7)
- Genus Trabecula Monterosato, 1884 (10)
- Genus Tragula Monterosato, 1884 (2)
- Genus Triptychus Mörch, 1875 (3)
- Genus Tropaeas Dall & Bartsch, 1904 (17)
- Genus Turriodostomia Habe, 1961 (1)
- Genus Ugartea Bartsch, 1917 accepted as Turbonilla Risso, 1826
- Genus Urambella Laseron, 1959 accepted as Pyramidella Lamarck, 1799
- Genus Vagna Dall & Bartsch, 1904 (3)
- Genus Visma Dall & Bartsch, 1904 (1)
- Genus Waikura Marwick, 1931 (1)
- Genus Wingenella Laseron, 1959 accepted as Longchaeus Mörch, 1875
- Genus Yoshishigea Hori & H. Fukuda, 1999 (1)
- Genus Zastoma Iredale, 1915 accepted as Brachystomia Monterosato, 1884
- Family Pyramidelloidea incertae sedis (2)
- Superorder Sacoglossa (371)
- Superorder Siphonarimorpha (141)
- Order Anaspidea accepted as Aplysiida
- Order Aplysiida (91)
- Order Aplysiomorpha accepted as Aplysiida
- Order Archaeopulmonata accepted as Siphonarioidea Gray, 1827
- Order Bullomorpha accepted as Cephalaspidea
- Order Cephalaspidea (840)
- Order Heterostropha accepted as Pyramidellidae J. E. Gray, 1840
- Order Pteropoda (148)
- Order Runcinacea accepted as Runcinida
- Order Runcinida (80)
- Order Tectibranchiata
- Order Thecosomata
- Order Umbraculida (11)
- 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 (1 335)
- 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 (9 471)
- 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 (20 790)
- Kingdom Fungi (1 432)
- Kingdom Monera represented as Bacteria
- Kingdom Plantae (10 581)
- Kingdom Protozoa (766)
- Kingdom Viruses (115)
