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- Mollusca (132 791)
- Subphylum Aculifera
- Subphylum Conchifera
- Subphylum Placophora accepted as Polyplacophora
- Superclass Aplacophora
- Class Amphineura accepted as Aculifera
- Class Bivalvia (25 009)
- Class Caudofoveata (143)
- Class Cephalopoda (1 834)
- Class Conchifera accepted as Bivalvia
- Class Cricoconarida † (1)
- Class Gastropoda (102 697)
- Subclass Amphigastropoda † (390)
- Subclass Angiogastropoda represented as Gastropoda
- Subclass Apogastropoda
- Subclass Caenogastropoda (53 636)
- Subclass Gastropoda incertae sedis (308)
- Subclass Heterobranchia (39 156)
- Subclass Neomphaliones accepted as Vetigastropoda
- Subclass Neritimorpha (1 914)
- Subclass Orthogastropoda represented as Gastropoda
- Subclass Patellogastropoda (511)
- Subclass Prosobranchia
- Subclass Psilogastropoda represented as Gastropoda
- Subclass Vetigastropoda (6 782)
- Order Anisobranchia accepted as Trochidae Rafinesque, 1815
- Order Cocculinida (69)
- Order Lepetellida (1 205)
- Order Neomphalida (63)
- Order Pleurotomariida (695)
- Order Seguenziida (923)
- Order Trochida (3 799)
- Superfamily Angarioidea Gray, 1857 accepted as Trochoidea Rafinesque, 1815
- Superfamily Phasianelloidea Swainson, 1840 accepted as Trochoidea Rafinesque, 1815
- Superfamily Trochoidea Rafinesque, 1815 (3 799)
- Family Angariidae J. E. Gray, 1857 (59)
- Family Anomphalidae Wenz, 1938 † (16)
- Family Araeonematidae Nützel, 2012 † (10)
- Family Areneidae J. H. McLean, 2012 (56)
- Family Ataphridae Cossmann, 1915 † (16)
- Family Calliostomatidae Thiele, 1924 (1847) (617)
- Family Colloniidae Cossmann, 1917 (362)
- Family Conradiidae A. N. Golikov & Starobogatov, 1987 (109)
- Family Crosseolidae Hickman, 2013 accepted as Conradiidae A. N. Golikov & Starobogatov, 1987
- Family Cyclostrematidae P. Fischer, 1885 accepted as Liotiidae Gray, 1850
- Family Delphinulidae Stoliczka, 1868 accepted as Angariidae J. E. Gray, 1857
- Family Elasmonematidae Knight, 1956 † (11)
- Family Epulotrochidae Gründel, Keupp & F. Lang, 2017 † (10)
- Family Eucochlidae Bandel, 2002 † (3)
- Family Fossarinidae Bandel, 2009 accepted as Fossarininae Bandel, 2009
- Family Gazidae Hickman & J. H. McLean, 1990 accepted as Margaritidae Thiele, 1924
- Family Liotiidae Gray, 1850 (154)
- Subfamily Liotiinae Gray, 1850 accepted as Liotiidae Gray, 1850
- Subfamily Mcleaniellinae Pacaud, 2018 † accepted as Mcleaniellidae Pacaud, 2018 †
- Genus Austroliotia Cotton, 1948 (9)
- Genus Bathyliotina Habe, 1961 (13)
- Genus Cenomanella Cossmann, 1918 † (2)
- Genus Circumstella Laseron, 1958 (1)
- Genus Cithna A. Adams, 1863 (8)
- Genus Cordarene S.-I Huang, C.-L. Chen & M.-H. Lin, 2018 (4)
- Genus Cyclostrema Marryat, 1819 (29)
- Genus Dentarene Iredale, 1929 (8)
- Genus Dichostasia Yochelson, 1956 † (4)
- Genus Globarene Iredale, 1929 (5)
- Genus Ilaira H. Adams & A. Adams, 1854 accepted as Liotia (Ilaira) H. Adams & A. Adams, 1854
- Genus Klebyella Gründel, 1998 † (1)
- Genus Liotia J. E. Gray, 1842 (16)
- Subgenus Liotia (Arene) H. Adams & A. Adams, 1854 accepted as Arene H. Adams & A. Adams, 1854
- Species Liotia (Arene) briareus (Dall, 1881) accepted as Arene briarea (Dall, 1881)
- Species Liotia (Arene) californica Dall, 1908 accepted as Macrarene californica californica (Dall, 1908)
- Species Liotia (Arene) cookeana Dall, 1918 accepted as Macrarene cookeana (Dall, 1918)
- Species Liotia (Arene) lamellosa Schepman, 1908 accepted as Bathyliotina sibogae S.-I Huang, C.-L. Chen & M.-H. Lin, 2018
- Species Liotia (Arene) milium Dall, 1892 † accepted as Parviturbo milium (Dall, 1892) †
- Species Liotia (Arene) miniata Dall, 1889 accepted as Arene miniata (Dall, 1889)
- Species Liotia (Arene) pacis Dall, 1908 accepted as Macrarene californica californica (Dall, 1908)
- Species Liotia (Arene) shandi F. W. Hutton, 1873 accepted as Modelia granosa (Martyn, 1784)
- Species Liotia (Arene) variabilis Dall, 1889 accepted as Arene variabilis (Dall, 1889)
- Species Liotia (Arene) venusta Woodring, 1928 accepted as Arene venusta (Woodring, 1928)
- Subgenus Liotia (Cynisca) H. Adams & A. Adams, 1854 accepted as Cynisca H. Adams & A. Adams, 1854
- Subgenus Liotia (Eccliseogyra) Dall, 1892 accepted as Eccliseogyra Dall, 1892
- Subgenus Liotia (Ilaira) H. Adams & A. Adams, 1854 accepted as Liotia J. E. Gray, 1842
- Subgenus Liotia (Liotina) P. Fischer, 1885 accepted as Liotina P. Fischer, 1885
- Subgenus Liotia (Lippistes) Montfort, 1810 accepted as Lippistes Montfort, 1810
- Species Liotia acuticostata P. P. Carpenter, 1864 accepted as Parviturbo acuticostatus (P. P. Carpenter, 1864)
- Species Liotia admirabilis E. A. Smith, 1890
- Species Liotia affinis A. Adams, 1850
- Species Liotia alazon Hedley, 1905 accepted as Acremodontina alazon (Hedley, 1905)
- Species Liotia amabilis Dall, 1889 accepted as Cyclostrema amabile (Dall, 1889)
- Species Liotia angasi Crosse, 1864 accepted as Pseudoliotia micans (A. Adams, 1850)
- Species Liotia angsanana K. Martin, 1922 †
- Species Liotia annulata Tenison Woods, 1878 accepted as Liotella annulata (Tenison Woods, 1878)
- Species Liotia anxia Hedley, 1909 accepted as Liotella anxia (Hedley, 1909)
- Species Liotia arenula E. A. Smith, 1890 accepted as Orbiscollonia arenula (E. A. Smith, 1890)
- Species Liotia armata A. Adams, 1861 accepted as Bathyliotina armata (A. Adams, 1861)
- Species Liotia asteriscus A. Gould, 1859 accepted as Pseudoliotia asteriscus (A. Gould, 1859)
- Species Liotia atomus Issel, 1869
- Species Liotia bairdii Dall, 1889 accepted as Arene bairdii (Dall, 1889)
- Species Liotia balboai A. M. Strong & Hertlein, 1939 accepted as Arene balboai (A. M. Strong & Hertlein, 1939)
- Species Liotia bellula H. Adams, 1873 accepted as Depressipoma pentegoniostoma (P. P. Carpenter, 1856)
- Species Liotia bicarinata (E. von Martens, 1902) accepted as Cinysca bicarinata (E. von Martens, 1902)
- Species Liotia botanica Hedley, 1915 accepted as Austroliotia botanica (Hedley, 1915)
- Species Liotia brasiliana Dall, 1927 accepted as Arene brasiliana (Dall, 1927)
- Species Liotia calculiformis O. Boettger, 1907 †
- Species Liotia californica Dall, 1908 accepted as Macrarene californica (Dall, 1908)
- Species Liotia calliglypta Melvill, 1891 accepted as Pseudoliotia calliglypta (Melvill, 1891)
- Species Liotia camaguinensis Pacaud, 2023
- Species Liotia cancellata (Gray, 1828)
- Species Liotia canimarensis Aguayo & Borro, 1946 †
- Species Liotia capitata Hedley, 1907 accepted as Liotella capitata (Hedley, 1907)
- Species Liotia carinata P. P. Carpenter, 1857 accepted as Arene carinata (P. P. Carpenter, 1857)
- Species Liotia centrifuga Dall, 1896 accepted as Arene centrifuga (Dall, 1896)
- Species Liotia chilensis Osorio, 2012
- Species Liotia cidaris (Reeve, 1843) accepted as Globarene cidaris (Reeve, 1843)
- Species Liotia compacta Petterd, 1884 accepted as Liotella compacta (Petterd, 1884)
- Species Liotia corona Hedley, 1902 accepted as Liotella corona (Hedley, 1902)
- Species Liotia coronilla Brösamlen, 1909 † accepted as Sclarotrarda coronilla (Brösamlen, 1909) †
- Species Liotia costulata Salvan, 1955 †
- Species Liotia daedala A. Adams, 1863 accepted as Munditia daedala (A. Adams, 1863)
- Species Liotia dautzenbergi Bavay, 1917 accepted as Astrosansonia dautzenbergi (Bavay, 1917)
- Species Liotia dennanti Chapman & Gabriel, 1914 † accepted as Munditia dennanti (Chapman & Gabriel, 1914) †
- Species Liotia densilaminata Verco, 1907 accepted as Brookula densilaminata (Verco, 1907)
- Species Liotia densilineata Tate, 1899 accepted as Austroliotia densilineata (Tate, 1899)
- Species Liotia devexa Hedley, 1901 accepted as Circumstella devexa (Hedley, 1901)
- Species Liotia disjuncta Hedley, 1903 accepted as Liocarinia disjuncta (Hedley, 1903)
- Species Liotia duplicata A. Adams, 1850
- Species Liotia echinacantha Melvill & Standen, 1903 accepted as Arene echinacantha (Melvill & Standen, 1903)
- Species Liotia erici A. M. Strong & Hertlein, 1939 accepted as Haplocochlias erici (A. M. Strong & Hertlein, 1939)
- Species Liotia evoluta (Reeve, 1843)
- Species Liotia farallonensis A. G. Smith, 1952 accepted as Macrarene farallonensis (A. G. Smith, 1952)
- Species Liotia fenestrata P. P. Carpenter, 1864
- Species Liotia fulgens A. Gould, 1859 accepted as Turbo cidaris cidaris Gmelin, 1791
- Species Liotia gowllandi Brazier, 1875 accepted as Pseudoliotia gowllandi (Brazier, 1875)
- Species Liotia hedleyi Pritchard & Gatliff, 1899 accepted as Munditia hedleyi (Pritchard & Gatliff, 1899)
- Species Liotia heimi A. M. Strong & Hertlein, 1939 accepted as Parviturbo stearnsii (Dall, 1918)
- Species Liotia huesonica Dall, 1927 accepted as Cyclostrema huesonicum (Dall, 1927)
- Species Liotia incidata Hedley, 1902 accepted as Tholostoma incidata (Hedley, 1902)
- Species Liotia krausii J. E. Gray, 1850 accepted as Pseudotorinia kraussi (J. E. Gray), 1850
- Species Liotia lamellosa Schepman, 1908 accepted as Bathyliotina sibogae S.-I Huang, C.-L. Chen & M.-H. Lin, 2018
- Species Liotia lamellosa Tenison Woods, 1877 † accepted as Liotina lamellosa (Tenison Woods, 1877) †
- Species Liotia langfordi Dall, 1926 accepted as Liotia solidula A. Gould, 1859
- Species Liotia latebrosa Hedley, 1907 accepted as Charisma latebrosa (Hedley, 1907)
- Species Liotia loculosa A. Gould, 1859 accepted as Dentarene loculosa (A. Gould, 1859)
- Species Liotia lodderae Petterd, 1884 accepted as Lodderia lodderae (Petterd, 1884)
- Species Liotia lucasensis A. M. Strong, 1934 accepted as Haplocochlias lucasensis (A. M. Strong, 1934)
- Species Liotia lurida Dall, 1913 accepted as Arene lurida (Dall, 1913)
- Species Liotia mayana Tate, 1899 accepted as Munditia mayana (Tate, 1899)
- Species Liotia micraster O. Boettger, 1907 † accepted as Astrosansonia micraster (O. Boettger, 1907) †
- Species Liotia microgrammata Dall, 1927
- Species Liotia milium Dall, 1892 † accepted as Parviturbo milium (Dall, 1892) †
- Species Liotia minima Tenison Woods, 1878 accepted as Lodderena minima (Tenison Woods, 1878)
- Species Liotia miosuturalis Kautsky, 1925 † accepted as Solariella miosuturalis (Kautsky, 1925) †
- Species Liotia noduosa A. Adams, 1850
- Species Liotia olivacea Dall, 1918 accepted as Arene olivacea (Dall, 1918)
- Species Liotia ornata Popa, 2001 †
- Species Liotia parvissima Hedley, 1899 accepted as Lophocochlias parvissimus (Hedley, 1899)
- Species Liotia petalifera Hedley & May, 1908 accepted as Liotella petalifera (Hedley & May, 1908)
- Species Liotia philtata Hedley, 1900 accepted as Pseudoliotia philtata (Hedley, 1900)
- Species Liotia pilula Dunker, 1860 accepted as Neocollonia pilula (Dunker, 1860)
- Species Liotia polypleura Hedley, 1904 accepted as Liotella polypleura (Hedley, 1904)
- Species Liotia pulcherrima A. Adams, 1850 accepted as Austroliotia pulcherrima (A. Adams, 1850)
- Species Liotia radiata (Kiener, 1838)
- Species Liotia rammata Dall, 1918 accepted as Arene fricki (Crosse, 1865)
- Species Liotia roblini R. M. Johnston, 1880 † accepted as Munditia roblini (R. M. Johnston, 1880) †
- Species Liotia romalea Melvill & Standen, 1903
- Species Liotia rostrata Hedley, 1900 accepted as Anticlimax rostrata (Hedley, 1900)
- Species Liotia rotula Suter, 1908 accepted as Liotella rotula (Suter, 1908)
- Species Liotia scitula Dall, 1919 accepted as Turbo scitulus (Dall, 1919)
- Species Liotia scotti Ortmann, 1900 †
- Species Liotia semiclathratula Schrenck, 1861 accepted as Liotinaria semiclathratula (Schrenck, 1861)
- Species Liotia semiclausa Thiele, 1925 accepted as Cinysca semiclausa (Thiele, 1925)
- Species Liotia sensuyi L. M. Vidal, 1921 † accepted as Pseudoliotina sensuyi (L. M. Vidal, 1921) †
- Species Liotia serrata Suter, 1908 accepted as Munditia serrata (Suter, 1908)
- Species Liotia siderea Guppy, 1896 †
- Species Liotia socorroensis A. M. Strong, 1934 accepted as Arene socorroensis (A. M. Strong, 1934)
- Species Liotia solidula A. Gould, 1859 accepted as Liotinaria solidula (A. Gould, 1859)
- Species Liotia solitaria Suter, 1908 accepted as Astraea heliotropium (Martyn, 1784)
- Species Liotia speciosa Angas, 1871 accepted as Pseudoliotia speciosa (Angas, 1871)
- Species Liotia squamicostata E. A. Smith, 1903
- Species Liotia subquadrata Tenison Woods, 1879 † accepted as Munditia subquadrata (Tenison Woods, 1879)
- Species Liotia suteri Mestayer, 1919 accepted as Dentarene suteri (Mestayer, 1919)
- Species Liotia tantilla A. Adams, 1863 accepted as Liotinaria tantilla (A. Adams, 1863)
- Species Liotia tasmanica Tenison Woods, 1876 accepted as Austroliotia tasmanica (Tenison Woods, 1876) †
- Species Liotia teruggii Brunet, 1995 †
- Species Liotia tortugana Dall, 1927 accepted as Cyclostrema tortuganum (Dall, 1927)
- Species Liotia tribulationis Hedley, 1909 accepted as Pseudoliotia tribulationis (Hedley, 1909)
- Species Liotia tricarinata (Stearns, 1872) accepted as Arene tricarinata (Stearns, 1872)
- Species Liotia trullata Dall, 1889 accepted as Arene bairdii (Dall, 1889)
- Species Liotia variabilis Dall, 1889 accepted as Arene variabilis (Dall, 1889)
- Species Liotia varicosa (Reeve, 1843)
- Species Liotia venusta Woodring, 1928 accepted as Arene venusta (Woodring, 1928)
- Species Liotia venusta Hedley, 1901 accepted as Circulus venustus (Hedley, 1901)
- Species Liotia veresimilis Guppy, 1896 †
- Species Liotia vitreospina Okutani, 1964
- Species Liotia voyi Pilsbry & Vanatta, 1905 accepted as Moniliotina voyi (Pilsbry & Vanatta, 1905)
- Species Liotia walkeri G. B. Sowerby III, 1908
- Species Liotia weaveri Effinger, 1938 †
- Genus Liotina P. Fischer, 1885 (6)
- Genus Liotinaria T. Habe, 1955 (5)
- Genus Macrarene Hertlein & A. M. Strong, 1951 (7)
- Genus Moniliotina S.-I Huang, M.-H. Lin & C.-L. Chen, 2019 (4)
- Genus Munditia H. J. Finlay, 1926 (17)
- Genus Pareuchelus O. Boettger, 1907 † (10)
- Genus Pterarene Sakurai & Habe, 1977 (1)
- Genus Rhodinoliotia Tomlin & Shackleford, 1915 (1)
- Genus Rotaliotina S.-I Huang, 2023 (2)
- Genus Rufanula Barnard, 1963 (1)
- Family Liotinidae Nomura, 1932 accepted as Liotiidae Gray, 1850
- Family Margaritidae Thiele, 1924 (76)
- Family Margaritinae Stoliczka, 1868 accepted as Margaritidae Thiele, 1924
- Family Metriomphalidae Gründel, Keupp & F. Lang, 2017 † (8)
- Family Microdomatidae Wenz, 1938 † (12)
- Family Nododelphinulidae L. R. Cox, 1960 † (17)
- Family Paleophasianellidae Chaix & Plicot, 2024 † (2)
- Family Phasianellidae Swainson, 1840 (84)
- Family Proconulidae L. R. Cox, 1960 † (10)
- Family Sclarotrardidae Gründel, Keupp & F. Lang, 2017 † (1)
- Family Skeneidae W. Clark, 1851 (440)
- Family Solariellidae A. W. B. Powell, 1951 (272)
- Family Stomatellidae J. E. Gray, 1840 accepted as Stomatellinae J. E. Gray, 1840
- Family Stomatiidae P. P. Carpenter, 1861 accepted as Stomatellinae J. E. Gray, 1840
- Family Talopiidae Finlay, 1928 accepted as Umboniinae H. Adams & A. Adams, 1854 (1840)
- Family Tegulidae Kuroda, Habe & Oyama, 1971 (120)
- Family Tricoliidae Woodring, 1928 accepted as Tricoliinae Woodring, 1928
- Family Trochidae Rafinesque, 1815 (1 043)
- Family Trochoidea incertae sedis (15)
- Family Turbinidae Rafinesque, 1815 (275)
- Family Tychobraheidae Horný, 1992 † (1)
- Family Velainellidae Vasseur, 1880 †
- Subfamily Minoliinae Kuroda, T. Habe & Oyama, 1971 accepted as Solariellidae A. W. B. Powell, 1951
- Subfamily Parataphrinae Calzada, 1989 † accepted as Proconulidae L. R. Cox, 1960 †
- Superfamily Fissurellacea accepted as Fissurelloidea J. Fleming, 1822
- Superfamily Trochacea accepted as Trochoidea Rafinesque, 1815
- Superfamily Turbinoidea Rafinesque, 1815 accepted as Trochoidea Rafinesque, 1815
- Superfamily Vetigastropoda incertae sedis (28)
- 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 (1 377)
- Class Polyplaxiphora accepted as Polyplacophora
- Class Rostroconchia † (64)
- Class Scaphopoda (752)
- Class Solenoconchia accepted as Scaphopoda
- Class Solenogastres (313)
- Subclass Chaetodermomorpha accepted as Caudofoveata