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Mollusca (132 927)
Subphylum Aculifera
Subphylum Conchifera
Subphylum Placophora accepted as Polyplacophora
Superclass Aplacophora
Class Amphineura accepted as Aculifera
Class Bivalvia (25 030)
Class Caudofoveata (143)
Class Cephalopoda (1 845)
Class Conchifera accepted as Bivalvia
Class Cricoconarida † (1)
Class Gastropoda (102 801)
Subclass Amphigastropoda † (404)
Subclass Angiogastropoda represented as Gastropoda
Subclass Apogastropoda
Subclass Caenogastropoda (53 703)
Subterclass Sorbeoconcha (147)
Superorder Hypsogastropoda
Order Architaenioglossa (4 920)
Superfamily Ampullarioidea Gray, 1824 (250)
Superfamily Cyclophoroidea J. E. Gray, 1847 (3 906)
Family Aciculidae J. E. Gray, 1850 (104)
Family Acmeidae Pollonera, 1905 accepted as Aciculidae J. E. Gray, 1850
Family Alycaeidae W. T. Blanford, 1864 accepted as Alycaeinae W. T. Blanford, 1864
Family Bolaniidae Wenz, 1915 accepted as Craspedopomatidae Kobelt & Möllendorff, 1898
Family Cochlostomatidae Kobelt, 1902 (118)
Family Craspedopomatidae Kobelt & Möllendorff, 1898 (21)
Family Cyclophoridae J. E. Gray, 1847 (1 604)
Subfamily Alycaeinae W. T. Blanford, 1864 (370)
Genus Alcaeus [sic] accepted as Alycaeus J. E. Gray, 1850
Genus Alycaeus J. E. Gray, 1850 (9)
Subgenus Alycaeus (Alycaeus) J. E. Gray, 1850 accepted as Alycaeus J. E. Gray, 1850
Subgenus Alycaeus (Chamalycaeus) Möllendorff, 1897 accepted as Chamalycaeus Möllendorff, 1897
Subgenus Alycaeus (Charax) W. H. Benson, 1859 accepted as Alycaeus (Dicharax) Kobelt & Möllendorff, 1900
Subgenus Alycaeus (Cycloryx) Godwin-Austen, 1914 accepted as Pincerna Preston, 1907
Subgenus Alycaeus (Dicharax) Kobelt & Möllendorff, 1900 accepted as Dicharax Kobelt & Möllendorff, 1900
Subgenus Alycaeus (Dioryx) W. H. Benson, 1859 accepted as Dioryx W. H. Benson, 1859
Subgenus Alycaeus (Metalycaeus) Pilsbry, 1900 accepted as Metalycaeus Pilsbry, 1900
Subgenus Alycaeus (Orthalycaeus) L. Pfeiffer, 1875 accepted as Alycaeus J. E. Gray, 1850
Subgenus Alycaeus (Pincerna) Preston, 1907 accepted as Pincerna Preston, 1907
Subgenus Alycaeus (Raptomphalus) Godwin-Austen, 1914 accepted as Metalycaeus Pilsbry, 1900
Subgenus Alycaeus (Stomacosmethis) Bollinger, 1918 accepted as Stomacosmethis Bollinger, 1918
Species Alycaeus aborensis Godwin-Austen, 1914 accepted as Metalycaeus aborensis (Godwin-Austen, 1914)
Species Alycaeus akhaensis Godwin-Austen, 1914 accepted as Dicharax akhaensis (Godwin-Austen, 1914)
Species Alycaeus alticola Foon & T.-S. Liew, 2017 accepted as Stomacosmethis kapayanensis alticola (Foon & T.-S. Liew, 2017)
Species Alycaeus altispirus Möllendorff, 1902 accepted as Stomacosmethis altispirus (Möllendorff, 1902)
Species Alycaeus amphora W. H. Benson, 1856 accepted as Dioryx amphora (W. H. Benson, 1856)
Species Alycaeus anapetes Panha & Burch, 1998
Species Alycaeus anceyi Mabille, 1887 accepted as Pincerna anceyi (Mabille, 1887)
Species Alycaeus andamaniae W. H. Benson, 1861 accepted as Chamalycaeus andamaniae (W. H. Benson, 1861)
Species Alycaeus anonymus Godwin-Austen, 1914 accepted as Dicharax anonymus (Godwin-Austen, 1914)
Species Alycaeus anthostoma Möllendorff, 1885 accepted as Dicharax anthostoma (Möllendorff, 1885)
Species Alycaeus armillatus W. H. Benson, 1856 accepted as Chamalycaeus armillatus (W. H. Benson, 1856)
Species Alycaeus asaluensis Godwin-Austen, 1914 accepted as Dicharax asaluensis (Godwin-Austen, 1914)
Species Alycaeus ataranensis Godwin-Austen, 1914 accepted as Dicharax ataranensis (Godwin-Austen, 1914)
Species Alycaeus avae W. T. Blanford, 1863 accepted as Dicharax avae (W. T. Blanford, 1863)
Species Alycaeus awaensis Pilsbry & Y. Hirase, 1904 accepted as Metalycaeus satsumanus awaensis (Pilsbry & Y. Hirase, 1904)
Species Alycaeus balingensis Tomlin, 1948 accepted as Stomacosmethis balingensis (Tomlin, 1948)
Species Alycaeus barowliensis Godwin-Austen, 1914 accepted as Dicharax barowliensis (Godwin-Austen, 1914)
Species Alycaeus beddomei Godwin-Austen, 1914 accepted as Metalycaeus beddomei (Godwin-Austen, 1914)
Species Alycaeus bembex W. H. Benson, 1859 accepted as Cycloryx bembex (W. H. Benson, 1859)
Species Alycaeus bhutanensis Godwin-Austen, 1914 accepted as Metalycaeus bhutanensis (Godwin-Austen, 1914)
Species Alycaeus bicrenatus Godwin-Austen, 1874 accepted as Dicharax bicrenatus (Godwin-Austen, 1874)
Species Alycaeus biexcisus Pilsbry, 1902 accepted as Dicharax biexcisus (Pilsbry, 1902)
Species Alycaeus bifrons Theobald, 1870 accepted as Dicharax bifrons (Theobald, 1870)
Species Alycaeus birugosus Godwin-Austen, 1893 accepted as Dicharax birugosus (Godwin-Austen, 1893)
Species Alycaeus blanfordi Godwin-Austen, 1914 accepted as Dicharax blanfordi (Godwin-Austen, 1914)
Species Alycaeus brahma Godwin-Austen, 1886 accepted as Metalycaeus brahma (Godwin-Austen, 1886)
Species Alycaeus broti Aldrich, 1889
Species Alycaeus burowliensis Godwin-Austen, 1914 accepted as Dicharax barowliensis (Godwin-Austen, 1914)
Species Alycaeus burroiensis Godwin-Austen, 1914 accepted as Dicharax burroiensis (Godwin-Austen, 1914)
Species Alycaeus burti Godwin-Austen, 1874 accepted as Metalycaeus burtii (Godwin-Austen, 1874)
Species Alycaeus burtii Godwin-Austen, 1874 accepted as Metalycaeus burtii (Godwin-Austen, 1874)
Species Alycaeus busbyi Godwin-Austen, 1893 accepted as Chamalycaeus busbyi (Godwin-Austen, 1893)
Species Alycaeus calopoma E. von Martens, 1908 accepted as Stomacosmethis calopoma (E. von Martens, 1908)
Species Alycaeus canaliculatus Möllendorff, 1894 accepted as Chamalycaeus canaliculatus (Möllendorff, 1894)
Species Alycaeus canaliculus Godwin-Austen, 1914 accepted as Dicharax birugosus (Godwin-Austen, 1893)
Species Alycaeus carinata Maassen, 2006 accepted as Alycaeus carinatus Maassen, 2006
Species Alycaeus carinatus Maassen, 2006 accepted as Stomacosmethis carinatus (Maassen, 2006)
Species Alycaeus caroli O. Semper, 1862 accepted as Metalycaeus caroli (O. Semper, 1862)
Species Alycaeus celebensis E. von Martens, 1891 accepted as Chamalycaeus celebensis (E. von Martens, 1891)
Species Alycaeus chanjukensis Godwin-Austen, 1914 accepted as Metalycaeus brahma (Godwin-Austen, 1886)
Species Alycaeus chaperi de Morgan, 1885 accepted as Alycaeus gibbosulus Stoliczka, 1872
Species Alycaeus charasensis Foon & T.-S. Liew, 2017 accepted as Stomacosmethis kapayanensis charasensis (Foon & T.-S. Liew, 2017)
Species Alycaeus chennelli Godwin-Austen, 1886 accepted as Dicharax chennelli (Godwin-Austen, 1886)
Species Alycaeus christae Maassen, 2006 accepted as Stomacosmethis christae (Maassen, 2006)
Species Alycaeus clementsi Foon & T.-S. Liew, 2017 accepted as Stomacosmethis kelantanensis clementsi (Foon & T.-S. Liew, 2017)
Species Alycaeus commutatus Godwin-Austen, 1914 accepted as Metalycaeus brahma (Godwin-Austen, 1886)
Species Alycaeus conformis Fulton, 1902
Species Alycaeus conicus Godwin-Austen, 1871 accepted as Dicharax conicus (Godwin-Austen, 1871)
Species Alycaeus constrictus (W. H. Benson, 1851) accepted as Cycloryx constrictus (W. H. Benson, 1851)
Species Alycaeus costacrassa Foon & T.-S. Liew, 2017 accepted as Stomacosmethis kapayanensis costacrassa (Foon & T.-S. Liew, 2017)
Species Alycaeus costulosus Bavay & Dautzenberg, 1912 accepted as Pincerna costulosus (Bavay & Dautzenberg, 1912)
Species Alycaeus crenatus Godwin-Austen, 1871 accepted as Dicharax crenatus (Godwin-Austen, 1871)
Species Alycaeus crenilabris Möllendorff, 1897 accepted as Pincerna crenilabris (Möllendorff, 1897)
Species Alycaeus crenulatus W. H. Benson, 1859 accepted as Metalycaeus crenulatus (W. H. Benson, 1859)
Species Alycaeus crispatus Godwin-Austen, 1871 accepted as Dicharax crispatus (Godwin-Austen, 1871)
Species Alycaeus cristatus Möllendorff, 1886 accepted as Dicharax cristatus (Möllendorff, 1886)
Species Alycaeus cucullatus Theobald, 1870 accepted as Dicharax cucullatus (Theobald, 1870)
Species Alycaeus cyclophoroides Pilsbry & Y. Hirase, 1909 accepted as Dicharax cyclophoroides (Pilsbry & Y. Hirase, 1909)
Species Alycaeus cyphogyrus Quadras & Möllendorff, 1895 accepted as Metalycaeus cyphogyrus (Quadras & Möllendorff, 1895)
Species Alycaeus daflaensis Godwin-Austen, 1876 accepted as Dicharax daflaensis (Godwin-Austen, 1876)
Species Alycaeus dalingensis Godwin-Austen, 1914 accepted as Dicharax dalingensis (Godwin-Austen, 1914)
Species Alycaeus damsangensis Godwin-Austen, 1886 accepted as Dicharax damsangensis (Godwin-Austen, 1886)
Species Alycaeus davisi Godwin-Austen, 1914 accepted as Dicharax cucullatus (Theobald, 1870)
Species Alycaeus depressus Bavay & Dautzenberg, 1912 accepted as Dicharax depressus (Bavay & Dautzenberg, 1912)
Species Alycaeus diagonius Godwin-Austen, 1871 accepted as Dicharax diagonius (Godwin-Austen, 1871)
Species Alycaeus digitatus H. F. Blanford, 1871 accepted as Dicharax digitatus (H. F. Blanford, 1871)
Species Alycaeus dikrangensis Godwin-Austen, 1914 accepted as Metalycaeus dikrangensis (Godwin-Austen, 1914)
Species Alycaeus diminutus Heude, 1885 accepted as Dicharax diminutus (Heude, 1885)
Species Alycaeus diplochilus Möllendorff, 1887 accepted as Dicharax diplochilus (Möllendorff, 1887)
Species Alycaeus distinctus Godwin-Austen, 1893 accepted as Metalycaeus distinctus (Godwin-Austen, 1893)
Species Alycaeus distortus (Haines, 1855) accepted as Dioryx distortus (Haines, 1855)
Species Alycaeus dohertyi Godwin-Austen, 1893 accepted as Dicharax dohertyi (Godwin-Austen, 1893)
Species Alycaeus dohrni O. Boettger, 1893 accepted as Stomacosmethis dohrni (O. Boettger, 1893)
Species Alycaeus dolichodeiros Heude, 1890 accepted as Dicharax dolichodeiros (Heude, 1890)
Species Alycaeus dolomiticus Heude, 1890 accepted as Metalycaeus rathouisianus (Heude, 1882)
Species Alycaeus duoculmen Godwin-Austen, 1914 accepted as Dicharax duoculmen (Godwin-Austen, 1914)
Species Alycaeus duorugosus Godwin-Austen, 1914 accepted as Dicharax duorugosus (Godwin-Austen, 1914)
Species Alycaeus edei Godwin-Austen, 1914 accepted as Dicharax edei (Godwin-Austen, 1914)
Species Alycaeus elevatus Heude, 1886 accepted as Dicharax elevatus (Heude, 1886)
Species Alycaeus everetti Godwin-Austen, 1889 accepted as Chamalycaeus everetti (Godwin-Austen, 1889)
Species Alycaeus excisus Möllendorff, 1887 accepted as Chamalycaeus excisus (Möllendorff, 1887)
Species Alycaeus expansus Foon & T.-S. Liew, 2017 accepted as Stomacosmethis kelantanensis expansus (Foon & T.-S. Liew, 2017)
Species Alycaeus expansus Heude, 1890 accepted as Metalycaeus muciferus (Heude, 1885)
Species Alycaeus expatriatus W. T. Blanford & H. F. Blanford, 1860 accepted as Dicharax expatriatus (W. T. Blanford & H. F. Blanford, 1860)
Species Alycaeus eydouxi Venmans, 1956
Species Alycaeus fargesianus Heude, 1885 accepted as Dicharax fargesianus (Heude, 1885)
Species Alycaeus feddenianus Theobald, 1870 accepted as Dioryx feddenianus (Theobald, 1870)
Species Alycaeus footei W. T. Blanford & H. F. Blanford, 1861 accepted as Dicharax footei (W. T. Blanford & H. F. Blanford, 1861)
Species Alycaeus fugori G. B. Sowerby II, 1877 accepted as Stomacosmethis jagori (E. von Martens, 1860)
Species Alycaeus fultoni Möllendorff, 1895 accepted as Stomacosmethis jagori (E. von Martens, 1860)
Species Alycaeus galbanus Godwin-Austen, 1889 accepted as Stomacosmethis galbanus (Godwin-Austen, 1889)
Species Alycaeus gemma Godwin-Austen, 1914 accepted as Dicharax gemma (Godwin-Austen, 1914)
Species Alycaeus gemmula W. H. Benson, 1859 accepted as Dicharax gemmula (W. H. Benson, 1859)
Species Alycaeus generosus Godwin-Austen, 1914 accepted as Dicharax generosus (Godwin-Austen, 1914)
Species Alycaeus gibbosulus Stoliczka, 1872
Species Alycaeus glaber W. T. Blanford, 1865 accepted as Dicharax glaber (W. T. Blanford, 1865)
Species Alycaeus globosus H. Adams, 1871 accepted as Pincerna globosus (H. Adams, 1871)
Variety Alycaeus globosus var. kinabaluana E. A. Smith, 1895 accepted as Pincerna globosa kinabaluana (E. A. Smith, 1895)
Variety Alycaeus globosus var. muluana E. A. Smith, 1895 accepted as Pincerna globosa muluana (E. A. Smith, 1895)
Variety Alycaeus globosus var. pygmaea E. A. Smith, 1895 accepted as Pincerna globosa pygmaea (E. A. Smith, 1895)
Variety Alycaeus globosus var. rabongensis E. A. Smith, 1895 accepted as Pincerna globosa rabongensis (E. A. Smith, 1895)
Species Alycaeus globulus Möllendorff, 1885 accepted as Dioryx globuloides Zilch, 1957
Species Alycaeus globulus Godwin-Austen, 1874 accepted as Dicharax globulus (Godwin-Austen, 1874)
Species Alycaeus goliath Páll-Gergely, 2023
Species Alycaeus graphicus W. T. Blanford, 1862 accepted as Pincerna graphicus (W. T. Blanford, 1862)
Species Alycaeus habiangensis Godwin-Austen, 1914 accepted as Dicharax habiangensis (Godwin-Austen, 1914)
Species Alycaeus harimensis Pilsbry, 1900 accepted as Dicharax japonicus (E. von Martens, 1865)
Species Alycaeus hebes W. H. Benson, 1857 accepted as Dicharax hebes (W. H. Benson, 1857)
Species Alycaeus helicodes Gredler, 1887 accepted as Metalycaeus muciferus (Heude, 1885)
Species Alycaeus himalayae Aravind & Páll-Gergely, 2023
Species Alycaeus hochstetteri L. Pfeiffer, 1861 accepted as Stomacosmethis jagori (E. von Martens, 1860)
Species Alycaeus hosei Godwin-Austen, 1889 accepted as Stomacosmethis hosei (Godwin-Austen, 1889)
Species Alycaeus huberi Thach, 2018
Species Alycaeus humilis W. T. Blanford, 1862 accepted as Dicharax humilis (W. T. Blanford, 1862)
Species Alycaeus hungerfordianus G. Nevill, 1881 accepted as Metalycaeus hungerfordianus (G. Nevill, 1881)
Species Alycaeus ikanensis Foon & T.-S. Liew, 2017 accepted as Stomacosmethis kapayanensis ikanensis (Foon & T.-S. Liew, 2017)
Species Alycaeus inflatus Möllendorff, 1886 accepted as Alycaeus (Chamalycaeus) moellendorffi Kobelt & Möllendorff, 1897
Species Alycaeus inflatus Godwin-Austen, 1874 accepted as Metalycaeus inflatus (Godwin-Austen, 1874)
Species Alycaeus ingrami W. T. Blanford, 1862 accepted as Dicharax ingrami (W. T. Blanford, 1862)
Species Alycaeus jagori E. von Martens, 1860 accepted as Stomacosmethis jagori (E. von Martens, 1860)
Species Alycaeus jaintiacus Godwin-Austen, 1871 accepted as Dicharax jaintiacus (Godwin-Austen, 1871)
Species Alycaeus japonicus E. von Martens, 1865 accepted as Dicharax japonicus (E. von Martens, 1865)
Species Alycaeus jousseaumei de Morgan, 1885
Species Alycaeus kamakiaensis Godwin-Austen, 1914 accepted as Metalycaeus kamakiaensis (Godwin-Austen, 1914)
Species Alycaeus kapayanensis de Morgan, 1886 accepted as Stomacosmethis kapayanensis (de Morgan, 1886)
Species Alycaeus kelantanensis Sykes, 1902 accepted as Stomacosmethis kelantanensis (Sykes, 1902)
Species Alycaeus kengtungensis Godwin-Austen, 1914 accepted as Metalycaeus heudei (Bavay & Dautzenberg, 1900)
Species Alycaeus kezamaensis Godwin-Austen, 1914 accepted as Dicharax kezamaensis (Godwin-Austen, 1914)
Species Alycaeus khasiacus Godwin-Austen, 1871 accepted as Dicharax khasiacus (Godwin-Austen, 1871)
Species Alycaeus kobeltianus Möllendorff, 1874 accepted as Dioryx kobeltianus (Möllendorff, 1874)
Species Alycaeus kuekenthali P. Sarasin & F. Sarasin, 1899 accepted as Stomacosmethis kuekenthali (P. Sarasin & F. Sarasin, 1899)
Species Alycaeus kurauensis Foon & T.-S. Liew, 2017 accepted as Stomacosmethis kapayanensis kurauensis (Foon & T.-S. Liew, 2017)
Species Alycaeus kurodai Pilsbry & Y. Hirase, 1908 accepted as Dicharax spiracellum (A. Adams & Reeve, 1850)
Species Alycaeus kurzianus Theobald & Stoliczka, 1872 accepted as Dicharax kurzianus (Theobald & Stoliczka, 1872)
Species Alycaeus laevicervix Pilsbry & Y. Hirase, 1904 accepted as Metalycaeus satsumanus laevicervix (Pilsbry & Y. Hirase, 1904)
Species Alycaeus laevis Pilsbry & Y. Hirase, 1909 accepted as Metalycaeus laevis (Pilsbry & Y. Hirase, 1909)
Species Alycaeus lahupaensis Godwin-Austen, 1914 accepted as Dicharax lahupaensis (Godwin-Austen, 1914)
Species Alycaeus latecostatus Möllendorff, 1882 accepted as Metalycaeus latecostatus (Möllendorff, 1882)
Species Alycaeus lectus Godwin-Austen, 1914 accepted as Dicharax lectus (Godwin-Austen, 1914)
Species Alycaeus lenticulus Godwin-Austen, 1874 accepted as Dicharax lenticulus (Godwin-Austen, 1874)
Species Alycaeus levis Godwin-Austen, 1914 accepted as Dicharax levis (Godwin-Austen, 1914)
Species Alycaeus liratulus Preston, 1907 accepted as Pincerna liratulus (Preston, 1907)
Species Alycaeus logtakensis Godwin-Austen, 1914 accepted as Dicharax logtakensis (Godwin-Austen, 1914)
Species Alycaeus lohitensis Godwin-Austen, 1914 accepted as Metalycaeus lohitensis (Godwin-Austen, 1914)
Species Alycaeus longituba E. von Martens, 1864 accepted as Dicharax longituba (E. von Martens, 1864)
Species Alycaeus luyorensis Godwin-Austen, 1914 accepted as Metalycaeus luyorensis (Godwin-Austen, 1914)
Species Alycaeus macgregori Godwin-Austen, 1914 accepted as Metalycaeus macgregori (Godwin-Austen, 1914)
Species Alycaeus magnus Godwin-Austen, 1893 accepted as Dicharax magnus (Godwin-Austen, 1893)
Species Alycaeus major Bavay & Dautzenberg, 1900 accepted as Dioryx dautzenbergi Páll-Gergely, 2017
Species Alycaeus maosmaiensis Godwin-Austen, 1922 accepted as Dicharax maosmaiensis (Godwin-Austen, 1922)
Species Alycaeus margarita Theobald, 1874 accepted as Pincerna margarita (Theobald, 1874)
Species Alycaeus matchacheepiorum Dumrongrojwattana & Maassen, 2008 accepted as Stomacosmethis matchacheepiorum (Dumrongrojwattana & Maassen, 2008)
Species Alycaeus microconus Möllendorff, 1887 accepted as Chamalycaeus microconus (Möllendorff, 1887)
Species Alycaeus microdiscus Möllendorff, 1887 accepted as Dicharax microdiscus (Möllendorff, 1887)
Species Alycaeus microstoma G. B. Sowerby II, 1877 accepted as Chamalycaeus sculptilis (W. H. Benson, 1856)
Species Alycaeus monadicus Heude, 1890 accepted as Dioryx monadicus (Heude, 1890)
Species Alycaeus montanus G. Nevill, 1881 accepted as Dicharax montanus (G. Nevill, 1881)
Species Alycaeus mouhoti L. Pfeiffer, 1863 accepted as Pincerna mouhoti (L. Pfeiffer, 1863)
Species Alycaeus muciferus Heude, 1885 accepted as Metalycaeus muciferus (Heude, 1885)
Species Alycaeus multirugosus Godwin-Austen, 1874 accepted as Dicharax multirugosus (Godwin-Austen, 1874)
Species Alycaeus mundulus Godwin-Austen, 1914 accepted as Metalycaeus mundulus (Godwin-Austen, 1914)
Species Alycaeus muspratti Godwin-Austen, 1914 accepted as Dicharax muspratti (Godwin-Austen, 1914)
Species Alycaeus mutatus Godwin-Austen, 1876 accepted as Dicharax mutatus (Godwin-Austen, 1876)
Species Alycaeus nagaensis Godwin-Austen, 1871 accepted as Dicharax nagaensis (Godwin-Austen, 1871)
Species Alycaeus nanus Möllendorff, 1886 accepted as Dicharax diminutus (Heude, 1885)
Species Alycaeus nattoungensis Godwin-Austen, 1914 accepted as Dicharax nattoungensis (Godwin-Austen, 1914)
Species Alycaeus neglectus Heude, 1885 accepted as Metalycaeus rathouisianus (Heude, 1882)
Species Alycaeus neglectus Godwin-Austen, 1914 accepted as Metalycaeus godwinausteni Páll-Gergely, 2020
Species Alycaeus nipponensis Reinhardt, 1877 accepted as Metalycaeus nipponensis (Reinhardt, 1877)
Species Alycaeus nitidus W. T. Blanford, 1862 accepted as Dicharax nitidus (W. T. Blanford, 1862)
Species Alycaeus nongtungensis Godwin-Austen, 1914 accepted as Dicharax nongtungensis (Godwin-Austen, 1914)
Species Alycaeus notatus Godwin-Austen, 1876 accepted as Dicharax notatus (Godwin-Austen, 1876)
Species Alycaeus notus Godwin-Austen, 1914 accepted as Dicharax notus (Godwin-Austen, 1914)
Species Alycaeus nowgongensis Godwin-Austen, 1914 accepted as Dicharax nowgongensis (Godwin-Austen, 1914)
Species Alycaeus oakesi Godwin-Austen, 1914 accepted as Metalycaeus oakesi (Godwin-Austen, 1914)
Species Alycaeus obscurus Godwin-Austen, 1914 accepted as Dicharax obscurus (Godwin-Austen, 1914)
Species Alycaeus ochraceus Godwin-Austen, 1893 accepted as Dicharax ochraceus (Godwin-Austen, 1893)
Species Alycaeus oglei Godwin-Austen, 1914 accepted as Chamalycaeus oglei (Godwin-Austen, 1914)
Species Alycaeus oligopleuris Möllendorff, 1887 accepted as Dicharax oligopleuris (Möllendorff, 1887)
Species Alycaeus omissus Godwin-Austen, 1914 accepted as Dicharax omissus (Godwin-Austen, 1914)
Species Alycaeus oshimanus Pilsbry & Y. Hirase, 1904 accepted as Dicharax oshimanus (Pilsbry & Y. Hirase, 1904)
Species Alycaeus otiphorus W. H. Benson, 1859 accepted as Cycloryx otiphorus (W. H. Benson, 1859)
Species Alycaeus pachitaensis Godwin-Austen, 1886 accepted as Dicharax pachitaensis (Godwin-Austen, 1886)
Species Alycaeus panggianus Godwin-Austen, 1914 accepted as Metalycaeus panggianus (Godwin-Austen, 1914)
Species Alycaeus parvulus Möllendorff, 1887 accepted as Dicharax parvulus (Möllendorff, 1887)
Species Alycaeus paucicostatus Godwin-Austen, 1914 accepted as Cycloryx paucicostatus (Godwin-Austen, 1914)
Species Alycaeus paviei Bavay & Dautzenberg, 1912 accepted as Metalycaeus heudei (Bavay & Dautzenberg, 1900)
Species Alycaeus peilei Preston, 1914 accepted as Dicharax peilei (Preston, 1914)
Species Alycaeus pentagonus Heude, 1886 accepted as Dicharax anthostoma (Möllendorff, 1885)
Species Alycaeus perakensis Crosse, 1879 accepted as Stomacosmethis perakensis (Crosse, 1879)
Species Alycaeus perplexus Godwin-Austen, 1914 accepted as Chamalycaeus perplexus (Godwin-Austen, 1914)
Species Alycaeus physis W. H. Benson, 1859 accepted as Metalycaeus physis (W. H. Benson, 1859)
Species Alycaeus pilula A. Gould, 1859 accepted as Dioryx pilula (A. Gould, 1859)
Species Alycaeus planorbulus Heude, 1885 accepted as Dicharax planorbulus (Heude, 1885)
Species Alycaeus plectocheilus W. H. Benson, 1859 accepted as Dicharax plectocheilus (W. H. Benson, 1859)
Species Alycaeus plicilabris Möllendorff, 1886 accepted as Dicharax plicilabris (Möllendorff, 1886)
Species Alycaeus politus W. T. Blanford, 1865 accepted as Dicharax politus (W. T. Blanford, 1865)
Species Alycaeus polygonoma W. T. Blanford, 1862 accepted as Metalycaeus polygonoma (W. T. Blanford, 1862)
Species Alycaeus praetextus van Benthem Jutting, 1959 accepted as Stomacosmethis praetextus (van Benthem Jutting, 1959)
Species Alycaeus pratatensis Panha & Burch, 1998 accepted as Dicharax pratatensis (Panha & Burch, 1998)
Species Alycaeus prosectus W. H. Benson, 1857 accepted as Metalycaeus prosectus (W. H. Benson, 1857)
Species Alycaeus purus Pilsbry & Y. Hirase, 1904 accepted as Dicharax purus (Pilsbry & Y. Hirase, 1904)
Species Alycaeus pusillus Godwin-Austen, 1871 accepted as Dicharax pusillus (Godwin-Austen, 1871)
Species Alycaeus pyramidalis W. H. Benson, 1856
Species Alycaeus quadrasi Möllendorff, 1895 accepted as Metalycaeus quadrasi (Möllendorff, 1895)
Species Alycaeus rathouisianus Heude, 1882 accepted as Metalycaeus rathouisianus (Heude, 1882)
Species Alycaeus rechilaensis Godwin-Austen, 1914 accepted as Dicharax rechilaensis (Godwin-Austen, 1914)
Species Alycaeus regalis Foon & T.-S. Liew, 2017 accepted as Stomacosmethis regalis (Foon & T.-S. Liew, 2017)
Species Alycaeus reinhardti Pilsbry, 1900 accepted as Alycaeus (Chamalycaeus) pilsbryi Kobelt, 1902
Species Alycaeus reinhardti Mörch, 1872 accepted as Chamalycaeus reinhardti (Mörch, 1872)
Species Alycaeus requiescens Mabille, 1887 accepted as Dioryx requiescens (Mabille, 1887)
Species Alycaeus reticulatus Möllendorff, 1897 accepted as Chamalycaeus reticulatus (Möllendorff, 1897)
Species Alycaeus richthofeni W. T. Blanford, 1863 accepted as Chamalycaeus richthofeni (W. T. Blanford, 1863)
Species Alycaeus rimatus O. Boettger, 1893 accepted as Stomacosmethis rimatus (O. Boettger, 1893)
Species Alycaeus roebeleni Möllendorff, 1894 accepted as Stomacosmethis roebeleni (Möllendorff, 1894)
Species Alycaeus rolfbrandti Maassen, 2006
Species Alycaeus rotundatus Godwin-Austen, 1914 accepted as Metalycaeus rotundatus (Godwin-Austen, 1914)
Species Alycaeus rubinus Godwin-Austen, 1893 accepted as Metalycaeus rubinus (Godwin-Austen, 1893)
Species Alycaeus rugosus Godwin-Austen, 1914 accepted as Metalycaeus rugosus (Godwin-Austen, 1914)
Species Alycaeus sandowayensis Godwin-Austen, 1914 accepted as Dicharax sandowayensis (Godwin-Austen, 1914)
Species Alycaeus satsumana Pilsbry, 1902 accepted as Metalycaeus satsumanus (Pilsbry, 1902)
Species Alycaeus satsumanus Pilsbry, 1902 accepted as Metalycaeus satsumanus (Pilsbry, 1902)
Species Alycaeus scepticus Theobald, 1863
Species Alycaeus sculptilis W. H. Benson, 1856 accepted as Chamalycaeus sculptilis (W. H. Benson, 1856)
Species Alycaeus sculpturus Godwin-Austen, 1875 accepted as Dicharax sculpturus (Godwin-Austen, 1875)
Species Alycaeus selangoriensis Foon & T.-S. Liew, 2017 accepted as Stomacosmethis kapayanensis selangoriensis (Foon & T.-S. Liew, 2017)
Species Alycaeus senyumensis Foon & T.-S. Liew, 2017 accepted as Stomacosmethis senyumensis (Foon & T.-S. Liew, 2017)
Species Alycaeus serratus Godwin-Austen, 1874 accepted as Dicharax serratus (Godwin-Austen, 1874)
Species Alycaeus sibbumensis Godwin-Austen, 1914 accepted as Metalycaeus sibbumensis (Godwin-Austen, 1914)
Species Alycaeus sinensis Heude, 1882 accepted as Metalycaeus sinensis (Heude, 1882)
Species Alycaeus somnueki Panha & Patamakanthin, 2001 accepted as Stomacosmethis somnueki (Panha & Patamakanthin, 2001)
Species Alycaeus somwangi Dumrongrojwattana & Maassen, 2008
Species Alycaeus sonlaensis Raheem & S. Schneider, 2017 † accepted as Dicharax sonlaensis (Raheem & S. Schneider, 2017) †
Species Alycaeus specus Godwin-Austen, 1889 accepted as Chamalycaeus specus (Godwin-Austen, 1889)
Species Alycaeus spiracellum (A. Adams & Reeve, 1850) accepted as Dicharax spiracellum (A. Adams & Reeve, 1850)
Species Alycaeus stoliczkii Godwin-Austen, 1874 accepted as Dicharax stoliczkii (Godwin-Austen, 1874)
Species Alycaeus strangulatus (L. Pfeiffer, 1846) accepted as Dicharax strangulatus (L. Pfeiffer, 1846)
Species Alycaeus strigatus Godwin-Austen, 1874 accepted as Dicharax strigatus (Godwin-Austen, 1874)
Species Alycaeus stylifer W. H. Benson, 1857 accepted as Metalycaeus stylifer (W. H. Benson, 1857)
Species Alycaeus subculmen Godwin-Austen, 1893 accepted as Dicharax subculmen (Godwin-Austen, 1893)
Species Alycaeus subfossilis P. Sarasin & F. Sarasin, 1899 accepted as Chamalycaeus subfossilis (P. Sarasin & F. Sarasin, 1899)
Species Alycaeus subinflatus Godwin-Austen, 1914 accepted as Metalycaeus subinflatus (Godwin-Austen, 1914)
Species Alycaeus succineus W. T. Blanford, 1862 accepted as Dicharax succineus (W. T. Blanford, 1862)
Species Alycaeus swinhoei H. Adams, 1866 accepted as Dioryx swinhoei (H. Adams, 1866)
Species Alycaeus sylheticus Godwin-Austen, 1914 accepted as Dicharax sylheticus (Godwin-Austen, 1914)
Species Alycaeus tanegashimae Pilsbry, 1902 accepted as Dicharax tanegashimae (Pilsbry, 1902)
Species Alycaeus tanghali Godwin-Austen, 1914 accepted as Chamalycaeus tanghali (Godwin-Austen, 1914)
Species Alycaeus teriaensis Godwin-Austen, 1914 accepted as Metalycaeus teriaensis (Godwin-Austen, 1914)
Species Alycaeus theobaldi W. T. Blanford, 1862 accepted as Dicharax theobaldi (W. T. Blanford, 1862)
Species Alycaeus thieroti de Morgan, 1886 accepted as Pincerna thieroti (de Morgan, 1886)
Species Alycaeus tokunoshimanus Pilsbry & Y. Hirase, 1904 accepted as Dicharax tokunoshimanus (Pilsbry & Y. Hirase, 1904)
Species Alycaeus tomotrema Möllendorff, 1887 accepted as Metalycaeus tomotrema (Möllendorff, 1887)
Species Alycaeus toruputuensis Godwin-Austen, 1914 accepted as Metalycaeus toruputuensis (Godwin-Austen, 1914)
Species Alycaeus tsushimanus Pilsbry & Y. Hirase, 1909 accepted as Dicharax tsushimanus (Pilsbry & Y. Hirase, 1909)
Species Alycaeus umbonalis W. H. Benson, 1856 accepted as Dicharax umbonalis (W. H. Benson, 1856)
Species Alycaeus urnula W. H. Benson, 1853 accepted as Dioryx urnula (W. H. Benson, 1853)
Species Alycaeus vanbuensis Bavay & Dautzenberg, 1900 accepted as Pincerna vanbuensis (Bavay & Dautzenberg, 1900)
Species Alycaeus varius Pilsbry & Y. Hirase, 1906 accepted as Metalycaeus varius (Pilsbry & Y. Hirase, 1906)
Species Alycaeus vesica Godwin-Austen, 1914 accepted as Metalycaeus vesica (Godwin-Austen, 1914)
Species Alycaeus vestitus W. T. Blanford, 1862 accepted as Dicharax vestitus (W. T. Blanford, 1862)
Species Alycaeus vinctus Pilsbry, 1902 accepted as Metalycaeus vinctus (Pilsbry, 1902)
Species Alycaeus virgogravida Foon & T.-S. Liew, 2017 accepted as Stomacosmethis kapayanensis virgogravida (Foon & T.-S. Liew, 2017)
Species Alycaeus vulcani W. T. Blanford, 1863 accepted as Chamalycaeus vulcani (W. T. Blanford, 1863)
Species Alycaeus wilhelminae Maassen, 2006 accepted as Stomacosmethis wilhelminae (Maassen, 2006)
Species Alycaeus woodthorpi Godwin-Austen, 1914 accepted as Dicharax woodthorpei (Godwin-Austen, 1914)
Species Alycaeus yamnayensis Godwin-Austen, 1914 accepted as Metalycaeus yamneyensis (Godwin-Austen, 1914)
Species Alycaeus yamneyensis Godwin-Austen, 1914 accepted as Metalycaeus yamneyensis (Godwin-Austen, 1914)
Species Alycaeus zhuangiyucuii H.-F. Yang, Z.-Y. Fan, D.-D. Qiao & J. He, 2012 accepted as Metalycaeus heudei (Bavay & Dautzenberg, 1900)
Genus Alycoeus [sic] accepted as Alycaeus J. E. Gray, 1850
Genus Awalycaeus Kuroda, 1951 accepted as Dicharax Kobelt & Möllendorff, 1900
Genus Chamalycaeus Möllendorff, 1897 (32)
Genus Cipangocharax Kuroda, 1943 accepted as Dicharax Kobelt & Möllendorff, 1900
Genus Cycloryx Godwin-Austen, 1914 (17)
Genus Dicharax Kobelt & Möllendorff, 1900 (175)
Genus Dioryx W. H. Benson, 1859 (27)
Genus Metalycaeus Pilsbry, 1900 (66)
Genus Pincerna Preston, 1907 (18)
Genus Stomacosmethis Bollinger, 1918 (26)
Subfamily Craspedopomatinae Kobelt & Möllendorff, 1898 accepted as Craspedopomatidae Kobelt & Möllendorff, 1898
Subfamily Cyclophoridae incertae sedis (36)
Subfamily Cyclophorinae J. E. Gray, 1847 (1 105)
Subfamily Ferussininae Wenz, 1923 (1915) † (8)
Subfamily Platyrhaphidinae Páll-Gergely, 2024 (76)
Subfamily Spirostomatinae Tielecke, 1940 (4)
Genus Allardia Nicolas, 1898 †
Genus Diaspira Soós, 1911 accepted as Ditropopsis E. A. Smith, 1897
Genus Eotrichophorus D. A. Bullis, Herhold, Czekanski-Moir, Grimaldi & Rundell, 2020 † (2)
Genus Lagochilus P. Fischer, 1885 accepted as Lagocheilus W. T. Blanford, 1864
Genus Lagochilus W. T. Blanford, 1864 accepted as Lagocheilus W. T. Blanford, 1864
Genus Perissocyclos D. A. Bullis, Herhold, Czekanski-Moir, Grimaldi & Rundell, 2020 † (1)
Genus Strophites J. W. Dawson, 1880 † accepted as Dendropupa R. Owen, 1859 †
Genus Trotopyrgula X.-H. Yu, 1987 † (2)
Family Cytoridae Climo, 1969 accepted as Liareinae A. W. B. Powell, 1946
Family Dicristidae A. N. Golikov & Starobogatov, 1975 accepted as Neocyclotidae Kobelt & Möllendorff, 1897
Family Diplommatinidae L. Pfeiffer, 1856 (1 026)
Family Ferussinidae Wenz, 1923 (1915) † accepted as Ferussininae Wenz, 1923 (1915) †
Family Hainesiidae Thiele, 1929 (220)
Family Lagocheilidae Stoliczka, 1872 accepted as Cyclophoridae J. E. Gray, 1847
Family Maizaniidae Tielecke, 1940 (40)
Family Megalomastomatidae W. T. Blanford, 1864 (100)
Family Megalostomatidae [sic] accepted as Megalomastomatidae W. T. Blanford, 1864
Family Neocyclotidae Kobelt & Möllendorff, 1897 (242)
Family Pollicariidae Thiele, 1929 (6)
Family Pupinidae L. Pfeiffer, 1853 (422)
Family Strophostomatidae Wenz, 1915 † accepted as Ferussininae Wenz, 1923 (1915) †
Genus Carinomphalus W. Yü, 1974 † (1)
Genus Diplommoptychia Maillard, 1884 †
Genus Loriolina Huckriede, 1967 † (1)
Genus Maillardinus Bandel, 1991 † (1)
Superfamily Viviparoidea Gray, 1847 (764)
Order Caenogastropoda incertae sedis (7 677)
Order Littorinimorpha (17 189)
Order Neogastropoda (23 770)
Order Stenoglossa accepted as Neogastropoda
Subclass Gastropoda incertae sedis (309)
Subclass Heterobranchia (39 177)
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 (6 783)
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