Between brackets is the number of accepted species

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- Mollusca (133 239)
- Subphylum Aculifera
- Subphylum Conchifera
- Subphylum Placophora accepted as Polyplacophora
- Superclass Aplacophora
- Class Amphineura accepted as Aculifera
- Class Bivalvia (25 078)
- Class Caudofoveata (143)
- Class Cephalopoda (1 917)
- Class Conchifera accepted as Bivalvia
- Class Cricoconarida † (1)
- Class Gastropoda (102 988)
- Subclass Amphigastropoda † (434)
- Subclass Angiogastropoda represented as Gastropoda
- Subclass Apogastropoda
- Subclass Caenogastropoda (53 804)
- Subterclass Sorbeoconcha (147)
- Superorder Hypsogastropoda
- Order Architaenioglossa (4 921)
- Order Caenogastropoda incertae sedis (7 686)
- Order Littorinimorpha (17 226)
- Order Neogastropoda (23 824)
- Superfamily Buccinoidea Rafinesque, 1815 (5 271)
- Superfamily Cancellarioidea Forbes & Hanley, 1851 accepted as Volutoidea Rafinesque, 1815
- Superfamily Conoidea J. Fleming, 1822 (8 748)
- Superfamily Mitroidea Swainson, 1831 (633)
- Superfamily Muricacea accepted as Muricoidea Rafinesque, 1815
- Superfamily Muricoidea Rafinesque, 1815 (2 940)
- Superfamily Neogastropoda incertae sedis (1 151)
- Superfamily Olivoidea Latreille, 1825 (741)
- Superfamily Pholidotomoidea Cossmann, 1896 † (56)
- Superfamily Pseudolivoidea De Gregorio, 1880 accepted as Olivoidea Latreille, 1825
- Superfamily Pyrifusoidea Bandel & Dockery, 2001 † accepted as Pholidotomoidea Cossmann, 1896 †
- Superfamily Sarganoidea Stephenson, 1923 † accepted as Pholidotomoidea Cossmann, 1896 †
- Superfamily Toxoglossa Troschel, 1848 accepted as Conoidea J. Fleming, 1822
- Superfamily Turbinelloidea Swainson, 1835 (1 255)
- Superfamily Volutoidea Rafinesque, 1815 (3 029)
- Family Cystiscidae W. Stimpson, 1865 (556)
- Family Granulinidae G. A. Coovert & H. K. Coovert, 1995 (156)
- Family Marginellidae J. Fleming, 1828 (1 446)
- Family Marginellonidae Coan, 1965 (4)
- Family Paladmetidae Stephenson, 1941 † accepted as Admetinae Troschel, 1865
- Family Plesiocystiscidae G. A. Coovert & H. K. Coovert, 1995 accepted as Plesiocystiscinae G. A. Coovert & H. K. Coovert, 1995
- Family Volutidae Rafinesque, 1815 (867)
- Subfamily Amoriinae J. E. Gray, 1857 (170)
- Subfamily Athletinae Pilsbry & Olsson, 1954 (105)
- Subfamily Calliotectinae Pilsbry & Olsson, 1954 (22)
- Subfamily Cymbiinae H. Adams & A. Adams, 1853 (1847) (236)
- Subfamily Cymbiolinae Bondarev, 1995 accepted as Melonini Pilsbry & Olsson, 1954
- Subfamily Eovolutinae Pacaud, 2016 † (25)
- Subfamily Fulgorariinae Pilsbry & Olsson, 1954 (57)
- Subfamily Indovolutinae Halder & S. S. Das, 2019 † (11)
- Subfamily Plicolivinae Bouchet, 1990 (2)
- Subfamily Scaphellinae Gray, 1857 (64)
- Subfamily Volutilithinae Pilsbry & Olsson, 1954 † (21)
- Subfamily Volutinae Rafinesque, 1815 (154)
- Tribe Lyriini Pilsbry & Olsson, 1954 (126)
- Genus Callipara J. E. Gray, 1847 (10)
- Genus Dallivoluta Okutani, 1982 accepted as Lyria J. E. Gray, 1847
- Genus Enaeta H. Adams & A. Adams, 1853 (11)
- Genus Falsilyria Pilsbry & Olsson, 1954 † (1)
- Genus Festilyria Pilsbry & Olsson, 1954 (5)
- Genus Harpella Gray, 1858 accepted as Lyria J. E. Gray, 1847
- Genus Harpeola Dall, 1907 accepted as Lyria J. E. Gray, 1847
- Genus Harpulina Dall, 1906 (3)
- Genus Indolyria Bail & Poppe, 2001 accepted as Lyria (Indolyria) Bail & Poppe, 2001
- Genus Leptoscapha P. Fischer, 1883 † (3)
- Genus Lyreneta Iredale, 1937 accepted as Lyria J. E. Gray, 1847
- Genus Lyria J. E. Gray, 1847 (82)
- Subgenus Lyria (Enaeta) H. Adams & A. Adams, 1853 accepted as Enaeta H. Adams & A. Adams, 1853
- Subgenus Lyria (Festilyria) Pilsbry & Olsson, 1954 accepted as Callipara (Festilyria) Pilsbry & Olsson, 1954
- Subgenus Lyria (Harpella) Gray, 1855 represented as Lyria J. E. Gray, 1847
- Subgenus Lyria (Harpeola) Dall, 1907 represented as Lyria J. E. Gray, 1847
- Subgenus Lyria (Indolyria) Bail & Poppe, 2001 represented as Lyria J. E. Gray, 1847
- Subgenus Lyria (Lyria) J. E. Gray, 1847 represented as Lyria J. E. Gray, 1847
- Subgenus Lyria (Lyrispina) Banerjee & Halder, 2024 † accepted as Lyriopsis Merle & Pacaud, 2014 †
- Subgenus Lyria (Microlyria) Bail & Poppe, 2001 represented as Lyria J. E. Gray, 1847
- Subgenus Lyria (Mitraelyria) Bail & Poppe, 2001 represented as Lyria J. E. Gray, 1847
- Species Lyria (Mitraelyria) archeri (Angas, 1865) represented as Lyria archeri (Angas, 1865)
- Species Lyria (Mitraelyria) beauii (P. Fischer & Bernardi, 1857) represented as Lyria beauii (P. Fischer & Bernardi, 1857)
- Subspecies Lyria (Mitraelyria) beauii archeri (Angas, 1865) accepted as Lyria (Mitraelyria) archeri (Angas, 1865)
- Subspecies Lyria (Mitraelyria) beauii beauii (P. Fischer & Bernardi, 1857) represented as Lyria beauii beauii (P. Fischer & Bernardi, 1857)
- Subspecies Lyria (Mitraelyria) beauii sabaensis Bail, 1993 accepted as Lyria (Mitraelyria) sabaensis Bail, 1993
- Species Lyria (Mitraelyria) cleaveri H. Morrison, 2008 represented as Lyria cleaveri H. Morrison, 2008
- Species Lyria (Mitraelyria) grangei Cernohorsky, 1980 represented as Lyria grangei Cernohorsky, 1980
- Species Lyria (Mitraelyria) grangeri (G. B. Sowerby III, 1900) represented as Lyria grangeri (G. B. Sowerby III, 1900)
- Species Lyria (Mitraelyria) grockeae (Petuch & Berschauer, 2017) accepted as Lyria mitraeformis f. grockeae (Petuch & Berschauer, 2017)
- Species Lyria (Mitraelyria) mitraeformis (Lamarck, 1811) represented as Lyria mitraeformis (Lamarck, 1811)
- Species Lyria (Mitraelyria) sabaensis Bail, 1993 represented as Lyria sabaensis Bail, 1993
- Subgenus Lyria (Plicolyria) Bail & Poppe, 2001 represented as Lyria J. E. Gray, 1847
- Subgenus Lyria (Pseudolyria) K. Martin, 1931 † represented as Lyria J. E. Gray, 1847
- Subgenus Lyria (Sannalyria) Pilsbry & Olsson, 1954 † represented as Lyria J. E. Gray, 1847
- Species Lyria acuticostata Chapman, 1920 †
- Species Lyria acuticostulata Darragh, 1989 †
- Species Lyria africana (Reeve, 1856) accepted as Festilyria africana (Reeve, 1856)
- Species Lyria anna (R. P. Lesson, 1833)
- Species Lyria antarctica Stilwell & Zinsmeister, 1992 † accepted as Miomelon antarctica (Stilwell & Zinsmeister, 1992) †
- Species Lyria aquitanica Peyrot, 1928 †
- Species Lyria archeri (Angas, 1865)
- Species Lyria aturensis Peyrot, 1928 † accepted as Lyria parens Sacco, 1890 †
- Species Lyria beauii (P. Fischer & Bernardi, 1857)
- Species Lyria boholensis Poppe, 1987
- Species Lyria bondarevi Bail & Poppe, 2004
- Species Lyria boucheti Bail & Poppe, 2004
- Species Lyria branderi (Defrance, 1829) †
- Species Lyria brianoi Poppe, 1999
- Species Lyria cassidula (Reeve, 1849)
- Species Lyria cleaveri H. Morrison, 2008
- Species Lyria cloveriana C. S. Weaver, 1963
- Species Lyria coquillensis F. E. Turner, 1938 † accepted as Eovoluta coquillensis (F. E. Turner, 1938) †
- Species Lyria cordis Bayer, 1971
- Species Lyria coroni (Morlet, 1888) †
- Species Lyria cossmanni Vredenburg, 1923 † accepted as Lyriopsis cossmanni (Vredenburg, 1923) †
- Species Lyria craticulata Darragh, 2017 †
- Species Lyria decora (Beyrich, 1853) †
- Species Lyria degrangei Peyrot, 1928 †
- Species Lyria delessertiana (Petit de la Saussaye, 1842)
- Species Lyria deliciosa (Montrouzier, 1859)
- Species Lyria dondani Angioy & Biraghi, 1982 accepted as Lyria mallicki Ladd, 1975
- Species Lyria doutei Bouchet & Bail, 1991
- Species Lyria ellenae H. Morrison, 2022
- Species Lyria estotiensis Bail, Ledon & Pacaud, 2022 †
- Species Lyria exorata Bouchet & Poppe, 1988
- Species Lyria feddeni Vredenburg, 1923 † accepted as Lyria cossmanni Vredenburg, 1923 †
- Species Lyria gabbi E. H. Vokes, 1998 †
- Species Lyria gemmata Tate, 1889 †
- Species Lyria goldfussi (Deshayes, 1865) †
- Species Lyria gracilicostata Ludbrook, 1978 †
- Species Lyria gracilis Staadt, 1913 †
- Species Lyria grandidieri Bail, 2002
- Species Lyria grangei Cernohorsky, 1980
- Species Lyria grangeri (G. B. Sowerby III, 1900)
- Species Lyria grockeae (Petuch & Berschauer, 2017) accepted as Lyria mitraeformis f. grockeae (Petuch & Berschauer, 2017)
- Species Lyria guionneti Poppe & Conde, 2001
- Species Lyria guttata (Reeve, 1849) accepted as Enaeta reevei Dall, 1907
- Species Lyria habei Okutani, 1979 accepted as Lyria mallicki Ladd, 1975
- Species Lyria hanzawai MacNeil, 1961 †
- Species Lyria harpa (Barnes, 1824) accepted as Enaeta barnesii (Gray, 1825)
- Species Lyria harpula (Lamarck, 1803) †
- Species Lyria harpularia Tate, 1888 †
- Species Lyria howensis Iredale, 1940 accepted as Lyria deliciosa howensis Iredale, 1940
- Species Lyria ickei K. Martin, 1906 †
- Species Lyria incomperta Hoerle & E. H. Vokes, 1978 †
- Species Lyria insignita Iredale, 1940
- Species Lyria jugosa (J. De C. Sowerby, 1840) †
- Species Lyria kawamurai Habe, 1975 accepted as Lyria planicostata (G. B. Sowerby III, 1903)
- Species Lyria kimberi Cotton, 1932 accepted as Lyria mitraeformis (Lamarck, 1811)
- Species Lyria koyuana (Yokoyama, 1928) †
- Species Lyria kuniene Bouchet, 1979
- Species Lyria lamellatoplicata Darragh & Kendrick, 2008 †
- Species Lyria laseroni (Iredale, 1937)
- Species Lyria leonardhilli Petuch, 1988 accepted as Enaeta leonardhilli (Petuch, 1988)
- Species Lyria leonardi W. K. Emerson, 1985
- Species Lyria lesbarritziana (Grateloup, 1845) †
- Species Lyria leslieboschae W. K. Emerson & Sage, 1986
- Species Lyria lozoueti Bail, Ledon & Pacaud, 2022 †
- Species Lyria lyraeformis (Swainson, 1821)
- Species Lyria madrakahensis Harzhauser, 2007 †
- Species Lyria magorum (Brocchi, 1814) †
- Species Lyria mallicki Ladd, 1975
- Species Lyria maniyaraensis Harzhauser, 2009 †
- Species Lyria michardi Bail, 2009
- Species Lyria mikoi Kosuge, 1985
- Species Lyria mitraeformis (Lamarck, 1811)
- Species Lyria mizuhonica Makiyama, 1927 †
- Species Lyria nucleus (Lamarck, 1811) accepted as Lyria pattersonia (G. Perry, 1811)
- Species Lyria ogasawarana Bail & Chino, 2015
- Species Lyria oliva (Grateloup, 1845) †
- Species Lyria opposita Iredale, 1937 accepted as Lyria pattersonia (G. Perry, 1811)
- Species Lyria overmanae Beets, 1942 †
- Species Lyria pallidula Habe, 1962 accepted as Lyria cassidula pallidula Habe, 1962
- Species Lyria parens Sacco, 1890 †
- Species Lyria patbaili Bouchet, 1999
- Species Lyria pattersonia (G. Perry, 1811)
- Species Lyria pauljohnsoni Poppe & Terryn, 2002
- Species Lyria pedersenii A. E. Verrill, 1870 accepted as Enaeta cumingii (Broderip, 1832)
- Species Lyria peroniana Iredale, 1940 accepted as Lyria pattersonia (G. Perry, 1811)
- Species Lyria peyrehoradensis Lozouet, 2019 †
- Species Lyria picturata (Grateloup, 1834) †
- Species Lyria planicostata (G. B. Sowerby III, 1903)
- Species Lyria ponsonbyi (E. A. Smith, 1901) accepted as Festilyria ponsonbyi (E. A. Smith, 1901)
- Species Lyria poppei Bail, 2002
- Species Lyria pulchella (G. B. Sowerby I, 1850) †
- Species Lyria puruensis K. Martin, 1931 †
- Species Lyria pycnopleura J. A. Gardner, 1938 † accepted as Falsilyria pycnopleura (J. A. Gardner, 1938) †
- Species Lyria queketti (E. A. Smith, 1901) accepted as Simililyria queketti (E. A. Smith, 1901)
- Species Lyria reinai Angioy & Biraghi, 1981 accepted as Lyria mallicki Ladd, 1975
- Species Lyria russjenseni W. K. Emerson, 1985
- Species Lyria sabaensis Bail, 1993
- Species Lyria santoensis Ladd, 1975 accepted as Lyria planicostata (G. B. Sowerby III, 1903)
- Species Lyria semiacuticostata Pritchard, 1896 †
- Species Lyria simplex (Deshayes, 1835) †
- Species Lyria solangeae Bozzetti, 2008
- Species Lyria subturgidula (A. d'Orbigny, 1850) †
- Species Lyria surinamensis (Okutani, 1982)
- Species Lyria taiwanica Lan, 1975 accepted as Lyria planicostata (G. B. Sowerby III, 1903)
- Species Lyria taurinia (Michelotti, 1847) †
- Species Lyria tulearensis Cosel & Blöcher, 1977
- Species Lyria valentina Bondarev, 1994 accepted as Lyria doutei Bouchet & Bail, 1991
- Species Lyria varicosa K. Martin, 1931 †
- Species Lyria vegai Clench & R. D. Turner, 1967
- Species Lyria ventricola (K. Martin, 1931) †
- Species Lyria vicdani Kosuge, 1981 accepted as Lyria mallicki Ladd, 1975
- Species Lyria zelandica H. J. Finlay, 1924 †
- Genus Lyriopsis Merle & Pacaud, 2014 † (1)
- Genus Mitraelyria Bail & Poppe, 2001 accepted as Lyria (Mitraelyria) Bail & Poppe, 2001
- Genus Otocheilus Conrad, 1865 † accepted as Lyria J. E. Gray, 1847
- Genus Plicolyria Bail & Poppe, 2001 accepted as Lyria (Plicolyria) Bail & Poppe, 2001
- Genus Pseudolyria K. Martin, 1931 † accepted as Lyria J. E. Gray, 1847
- Genus Sannalyria Pilsbry & Olsson, 1954 † accepted as Lyria J. E. Gray, 1847
- Genus Simililyria Bail & Poppe, 2001 (10)
- Genus Similyria [sic] accepted as Simililyria Bail & Poppe, 2001
- Tribe Volutini Rafinesque, 1815 (28)
- Subfamily Volutomitrinae J. E. Gray, 1854 accepted as Volutomitridae J. E. Gray, 1854
- Subfamily Zidoninae H. Adams & A. Adams, 1853 accepted as Zidonini H. Adams & A. Adams, 1853
- Genus Rostellites Conrad, 1855 †
- Genus Tectaplica Wade, 1916 †
- Order Stenoglossa accepted as Neogastropoda
- Subclass Gastropoda incertae sedis (313)
- Subclass Heterobranchia (39 218)
- Subclass Neomphaliones accepted as Vetigastropoda
- Subclass Neritimorpha (1 916)
- Subclass Orthogastropoda represented as Gastropoda
- Subclass Patellogastropoda (514)
- Subclass Prosobranchia
- Subclass Psilogastropoda represented as Gastropoda
- Subclass Vetigastropoda (6 789)
- Class Lamellibranchiata accepted as Bivalvia
- Class Loricata accepted as Polyplacophora
- Class Mollusca incertae sedis † (372)
- Class Monoplacophora (229)
- Class Pelecypoda accepted as Bivalvia
- Class Polyplacophora (1 381)
- Class Polyplaxiphora accepted as Polyplacophora
- Class Rostroconchia † (64)
- Class Scaphopoda (753)
- Class Solenoconchia accepted as Scaphopoda
- Class Solenogastres (313)
- Subclass Chaetodermomorpha accepted as Caudofoveata