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- Mollusca (132 754)
- Subphylum Aculifera
- Subphylum Conchifera
- Subphylum Placophora accepted as Polyplacophora
- Superclass Aplacophora
- Class Amphineura accepted as Aculifera
- Class Bivalvia (24 992)
- Class Caudofoveata (143)
- Class Cephalopoda (1 832)
- Class Conchifera accepted as Bivalvia
- Class Cricoconarida † (1)
- Class Gastropoda (102 679)
- Subclass Amphigastropoda † (387)
- Subclass Angiogastropoda represented as Gastropoda
- Subclass Apogastropoda
- Subclass Caenogastropoda (53 623)
- Subterclass Sorbeoconcha (147)
- Superorder Hypsogastropoda
- Order Architaenioglossa (4 917)
- Order Caenogastropoda incertae sedis (7 675)
- Suborder Heteroglossa
- Suborder Ptenoglossa
- Superfamily Abyssochrysoidea Tomlin, 1927 (104)
- Superfamily Acteoninoidea Cossmann, 1895 †
- Superfamily Campaniloidea (288)
- Superfamily Cerithioidea J. Fleming, 1822 (3 706)
- Superfamily Cerithiopsoidea accepted as Triphoroidea J. E. Gray, 1847
- Superfamily Epitonioidea S. S. Berry, 1910 (1812) (1 091)
- Family Epitoniidae S. S. Berry, 1910 (1812) (1 091)
- Subfamily Acirsinae Cossmann, 1912 accepted as Epitoniidae S. S. Berry, 1910 (1812)
- Subfamily Acrillinae Jousseaume, 1912 accepted as Epitoniidae S. S. Berry, 1910 (1812)
- Subfamily Cirsotrematinae Jousseaume, 1912 accepted as Epitoniidae S. S. Berry, 1910 (1812)
- Subfamily Clathroscalinae Cossmann, 1912 accepted as Epitoniidae S. S. Berry, 1910 (1812)
- Subfamily Epitoniinae S. S. Berry, 1910 (1812) accepted as Epitoniidae S. S. Berry, 1910 (1812)
- Subfamily Gyroscalinae Jousseaume, 1912 accepted as Epitoniidae S. S. Berry, 1910 (1812)
- Subfamily Lioatlantinae B. Dybowski & Grochmalicki, 1920 accepted as Epitoniidae S. S. Berry, 1910 (1812)
- Subfamily Opaliinae Cossmann, 1912 accepted as Epitoniidae S. S. Berry, 1910 (1812)
- Subfamily Papyriscalinae Jousseaume, 1912 accepted as Epitoniidae S. S. Berry, 1910 (1812)
- Genus Achates Gistel, 1848 accepted as Janthina Röding, 1798
- Genus Aciculiscala Sohl, 1963 † (2)
- Genus Aciona Leach, 1815 accepted as Epitonium Röding, 1798
- Genus Acirsa Mörch, 1857 (47)
- Genus Acrilla H. Adams, 1860 (20)
- Genus Acrilloscala Sacco, 1890 (5)
- Species Acrilloscala bifidolirata (de Boury, 1913) †
- Species Acrilloscala chameriacensis (de Boury, 1913) †
- Species Acrilloscala fusca (G. B. Sowerby II, 1844)
- Species Acrilloscala geniculata (Brocchi, 1814) †
- Species Acrilloscala lamyi (de Boury, 1909)
- Species Acrilloscala turnerae (van Regteren Altena, 1971) accepted as Gyroscala xenicima (Melvill & Standen, 1903)
- Genus Acutiscala de Boury, 1909 accepted as Epitonium Röding, 1798
- Genus Alexandria Tomlin, 1926 accepted as Alexania Strand, 1928
- Genus Alexania Strand, 1928 (6)
- Genus Alora H. Adams, 1861 (8)
- Genus Amaea H. Adams & A. Adams, 1853 (61)
- Genus Amethistina [sic] accepted as Janthina Röding, 1798
- Genus Ametistina Schinz, 1825 accepted as Janthina Röding, 1798
- Genus Amiciscala de Boury, 1912 accepted as Epitonium Röding, 1798
- Genus Anguliscala de Boury, 1909 accepted as Epitonium Röding, 1798
- Genus Arctoscala Dall, 1909 accepted as Boreoscala Kobelt, 1902
- Genus Asperiscala de Boury, 1909 accepted as Epitonium Röding, 1798
- Genus Avalitiscala de Boury, 1912 accepted as Epitonium Röding, 1798
- Genus Belliscala Stephenson, 1941 † (3)
- Genus Boreoscala Kobelt, 1902 (11)
- Genus Caloscala Tate, 1885 † accepted as Cirsotrema Mörch, 1852
- Genus Cavoscala Whitfield, 1892 † (2)
- Genus Cerithiscala de Boury, 1887 † (6)
- Genus Chuniscala Thiele, 1928 (2)
- Genus Cinctiscala de Boury, 1909 accepted as Epitonium Röding, 1798
- Genus Cingulacirsa Higo & Goto, 1993
- Genus Circuloscala de Boury, 1886 † (1)
- Genus Cirsotrema Mörch, 1852 (71)
- Genus Clathroscala de Boury, 1890 (4)
- Genus Clathrus Oken, 1815 accepted as Clathrus Agassiz, 1837 †
- Genus Clathrus Agassiz, 1837 † (2)
- Genus Claviscala de Boury, 1909 (12)
- Genus Compressiscala Masahito & T. Habe, 1976 accepted as Gregorioiscala Cossmann, 1912
- Genus Confusiscala de Boury, 1909 † (3)
- Genus Connexiscala de Boury, 1909 accepted as Epitonium Röding, 1798
- Genus Coroniscala de Boury, 1909 † accepted as Cirsotrema (Coroniscala) de Boury, 1909 †
- Genus Couthouyella Bartsch, 1909 (2)
- Genus Crebriscala de Boury, 1909 (1)
- Genus Crenuliscala Iredale, 1936 accepted as Epitonium Röding, 1798
- Genus Crisposcala de Boury, 1886 accepted as Epitonium Röding, 1798
- Genus Cycloscala Dall, 1889 (13)
- Genus Cyclostoma Lamarck, 1799 accepted as Epitonium Röding, 1798
- Genus Cylindriscala de Boury, 1909 (25)
- Genus Dannevigena Iredale, 1936 accepted as Cirsotrema (Dannevigena) Iredale, 1936
- Genus Delicatiscala de Boury, 1909 accepted as Epitonium Röding, 1798
- Genus Dentiscala de Boury, 1886 (1)
- Genus Depressiscala de Boury, 1909 accepted as Epitonium Röding, 1798
- Genus Dulciscala de Boury, 1909 accepted as Epitonium Röding, 1798
- Genus Eccliseogyra Dall, 1892 (16)
- Genus Eglisia J. E. Gray, 1842 (4)
- Genus Elegantiscala de Boury, 1911 † accepted as Cirsotrema Mörch, 1852
- Genus Epidendrium A. Gittenberger & E. Gittenberger, 2005 (6)
- Genus Epifungium A. Gittenberger & E. Gittenberger, 2005 (12)
- Genus Epitonium Röding, 1798 (444)
- Genus Evolutiscala de Boury, 1909 accepted as Epitonium Röding, 1798
- Genus Ferminoscala Dall, 1908 accepted as Amaea H. Adams & A. Adams, 1853
- Genus Filiscala de Boury, 1911 (2)
- Genus Foliaceiscala de Boury, 1912 accepted as Epitonium Röding, 1798
- Genus Foraceiscala [sic] accepted as Foliaceiscala de Boury, 1912
- Genus Foratiscala de Boury, 1887 † (4)
- Genus Fragiliscala M. Azuma, 1962 accepted as Epitonium Röding, 1798
- Genus Fragilopalia Azuma, 1972
- Genus Funiscala de Boury, 1890 (1)
- Genus Fuscoscala Sacco, 1890 accepted as Epitonium Röding, 1798
- Genus Gibboscala Kollmann, 2005 † (3)
- Genus Glabriscala de Boury, 1909 accepted as Epitonium Röding, 1798
- Genus Globiscala de Boury, 1909 (4)
- Genus Goniscala Marwick, 1943 † (1)
- Genus Graciliscala de Boury, 1909 accepted as Epitonium (Graciliscala) de Boury, 1909
- Genus Gradatiscala de Boury, 1909 accepted as Epitonium Röding, 1798
- Genus Granuliscala de Boury, 1909 accepted as Opalia H. Adams & A. Adams, 1853
- Genus Gregoriiscala [sic] accepted as Gregorioiscala Cossmann, 1912
- Genus Gregorioiscala Cossmann, 1912 (19)
- Genus Gregorioscala [sic] accepted as Gregorioiscala Cossmann, 1912
- Genus Gyroscala de Boury, 1887 (15)
- Genus Habea Kuroda, 1943 accepted as Alexania Strand, 1928
- Genus Hartungia Bronn, 1861 † accepted as Janthina Röding, 1798
- Genus Heligmope Tate, 1893 † accepted as Janthina Röding, 1798
- Genus Hemiacirsa de Boury, 1890 accepted as Acirsa Mörch, 1857 (2)
- Genus Hirtoscala Monterosato, 1890 accepted as Epitonium Röding, 1798
- Genus Hyaloscala de Boury, 1890 accepted as Epitonium (Hyaloscala) de Boury, 1889
- Genus Ianthina accepted as Janthina Röding, 1798
- Genus Innesiscala de Boury, 1912 accepted as Epitonium Röding, 1798
- Genus Iodes Mörch, 1860 accepted as Janthina Röding, 1798
- Genus Iodina Mörch, 1860 accepted as Janthina Röding, 1798
- Genus Iphitella Thiele, 1925 accepted as Iphitus Jeffreys, 1883
- Genus Iphitus Jeffreys, 1883 (11)
- Genus Janthina Röding, 1798 (8)
- Genus Janthinus Montfort, 1810 accepted as Janthina Röding, 1798
- Genus Janthoscala Mörch, 1875 accepted as Epitonium Röding, 1798
- Genus Jantina [sic] accepted as Janthina Röding, 1798
- Genus Kallosinistrala Stilwell & Zinsmeister, 1992 † accepted as Acirsa Mörch, 1857
- Genus Kaneconcha Kaim, Tucholke & Warén, 2012 † accepted as Janthina Röding, 1798
- Genus Kurodacirsa Masahito & T. Habe, 1975 (2)
- Genus Laeviscala de Boury, 1909 accepted as Epitonium (Laeviscala) de Boury, 1909
- Genus Lamelliscala de Boury, 1909 accepted as Epitonium (Lamelliscala) de Boury, 1909
- Genus Lampropalia Kuroda & Ko. Itô, 1961 accepted as Cylindriscala de Boury, 1909
- Genus Laniscala T. C. Lan, 1976 accepted as Cirsotrema Mörch, 1852
- Genus Lepidiscala de Boury, 1917 accepted as Epitonium Röding, 1798
- Genus Liapinella Guzhov, 2006 † (1)
- Genus Limiscala de Boury, 1909 accepted as Epitonium Röding, 1798
- Genus Limniscala [sic] accepted as Limiscala de Boury, 1909
- Genus Linctoscala Monterosato, 1890 accepted as Epitonium Röding, 1798
- Genus Lineoscala de Boury, 1909 accepted as Epitonium Röding, 1798
- Genus Littoriniscala de Boury, 1887 † accepted as Amaea (Littoriniscala) de Boury, 1887 †
- Genus Mammiscala de Boury, 1909
- Genus Mazescala Iredale, 1936 accepted as Epitonium Röding, 1798
- Genus Minabescala T. Nakayama, 1994 (1)
- Genus Minutiscala de Boury, 1909 accepted as Epitonium Röding, 1798
- Genus Murdochella H. J. Finlay, 1926 (8)
- Genus Narrimania Taviani, 1984 (4)
- Genus Narvaliscala Iredale, 1936 (3)
- Genus Nipponoscala Masahito & T. Habe, 1973 accepted as Epitonium Röding, 1798
- Genus Nitidiscala de Boury, 1909 accepted as Epitonium Röding, 1798
- Genus Nitidoscala [sic] accepted as Epitonium (Nitidiscala) de Boury, 1909
- Genus Nodiscala de Boury, 1890 accepted as Opalia H. Adams & A. Adams, 1853 (3)
- Genus Notacirsa Finlay, 1926 accepted as Acirsa Mörch, 1857
- Genus Nystiella Clench & R. D. Turner, 1952 accepted as Opaliopsis Thiele, 1928
- Genus Opalia H. Adams & A. Adams, 1853 (103)
- Genus Opaliopsis Thiele, 1928 (13)
- Genus Papuliscala de Boury, 1911 (23)
- Genus Papyriscala de Boury, 1909 accepted as Epitonium (Papyriscala) de Boury, 1909
- Genus Parajanthina Tomida & Itoigawa, 1982 † accepted as Janthina Röding, 1798
- Genus Parviscala de Boury, 1887 accepted as Epitonium Röding, 1798
- Genus Pauciacirsa Dockery, 1993 † (1)
- Genus Payebrosoma Tapparone Canefri, 1876 accepted as Psychrosoma Tapparone Canefri, 1876
- Genus Periapta Bouchet & Warén, 1986 (4)
- Genus Perlucidiscala de Boury, 1912 accepted as Epitonium Röding, 1798
- Genus Pictoscala Dall, 1917 accepted as Gyroscala de Boury, 1887
- Genus Plastiscala Iredale, 1936 accepted as Acirsa Mörch, 1857 (5)
- Genus Plesioacirsa de Boury, 1909 accepted as Acirsa Mörch, 1857
- Genus Plicacerithium Gerasimov, 1992 † (4)
- Genus Pliciscala de Boury, 1887 accepted as Opalia (Pliciscala) de Boury, 1887
- Genus Pomiscala Iredale, 1936 accepted as Gyroscala (Pomiscala) Iredale, 1936
- Genus Problitora Wenz, 1939 accepted as Alexania Strand, 1928
- Genus Propescala Cotton & Godfrey, 1931 (1)
- Genus Proscala Cossmann, 1912 † (3)
- Genus Pseudacirsa Kobelt, 1903 accepted as Acirsa Mörch, 1857
- Genus Pseudoacirsa de Boury, 1909 accepted as Acirsa Mörch, 1857
- Genus Pseudoclaviscala Dockery, 1993 † (2)
- Genus Pseudostenorhytis [sic] accepted as Sthenorytis Conrad, 1863
- Genus Pseudosthenorytis Sacco, 1891 accepted as Sthenorytis Conrad, 1863
- Genus Psychrosoma Tapparone Canefri, 1876 accepted as Opalia H. Adams & A. Adams, 1853
- Genus Pudentiscala Iredale, 1936 accepted as Epitonium Röding, 1798
- Genus Punctiscala de Boury, 1890 (12)
- Genus Pupiscala Masahito, Kuroda & Habe, 1971 accepted as Epitonium Röding, 1798
- Genus Pustuliscala [sic] accepted as Papuliscala de Boury, 1911
- Genus Recluzia Petit de la Saussaye, 1853 (2)
- Genus Rectacirsa Iredale, 1936 (3)
- Genus Resticuliscala de Boury, 1911 accepted as Epitonium Röding, 1798
- Genus Rugatiscala de Boury, 1913 † accepted as Opalia H. Adams & A. Adams, 1853
- Genus Rutelliscala Kilburn, 1985 (1)
- Genus Sagamiscala Masahito, Kuroda & Habe, 1971 accepted as Globiscala de Boury, 1909
- Genus Scala Mörch, 1852 accepted as Epitonium Röding, 1798
- Genus Scalaria Lamarck, 1801 accepted as Epitonium Röding, 1798
- Genus Scalarus Montfort, 1810 accepted as Epitonium Röding, 1798
- Genus Scalatarius Duméril, 1805 accepted as Epitonium Röding, 1798
- Genus Scalina Conrad, 1865 † accepted as Amaea H. Adams & A. Adams, 1853 (1)
- Genus Sculptifer Beu & Climo, 1974 accepted as Iphitus Jeffreys, 1883
- Genus Sodaliscala de Boury, 1909 accepted as Epitonium Röding, 1798
- Genus Solutiscala de Boury, 1909 accepted as Eccliseogyra Dall, 1892
- Genus Solvaclathrus Iredale, 1936 accepted as Cycloscala Dall, 1889
- Genus Sphaeroscala Monterosato, 1890 accepted as Epitonium Röding, 1798
- Genus Spiniscala de Boury, 1900 accepted as Epitonium Röding, 1798
- Genus Spirilliscala de Boury, 1915 †
- Genus Stenacme Pilsbry, 1945 accepted as Alexania Strand, 1928
- Genus Stenorhyscala de Boury, 1912 accepted as Sthenorytis Conrad, 1863
- Genus Stenorhytis Cossmann, 1912 accepted as Sthenorytis Conrad, 1863
- Genus Stenorhytiscala de Boury, 1912 accepted as Sthenorytis Conrad, 1863
- Genus Sthenorytis Conrad, 1863 (10)
- Genus Sthenorytiscala de Boury, 1912 accepted as Sthenorytis Conrad, 1863
- Genus Striaticostatum Sohl, 1963 † (3)
- Genus Striatiscala de Boury, 1909
- Genus Stylotrochus G. Seguenza, 1876 accepted as Iphitus Jeffreys, 1883
- Genus Subuliscala de Boury, 1909 † (1)
- Genus Surrepifungium A. Gittenberger & E. Gittenberger, 2005 (4)
- Genus Tenuiscala de Boury, 1887 (4)
- Genus Teramachiacirsa Kuroda & Ko. Itô, 1961 accepted as Alora H. Adams, 1861
- Genus Textiscala de Boury, 1911 † accepted as Amaea H. Adams & A. Adams, 1853
- Genus Tioria Marwick, 1928 † accepted as Cirsotrema (Tioria) Marwick, 1928 †
- Genus Tomlinula Strand, 1932 accepted as Alexania Strand, 1928
- Genus Torquatiscala de Boury, 1912 accepted as Cylindriscala de Boury, 1909
- Genus Tumidiacirsa de Boury, 1911 (1)
- Genus Turbiniscala de Boury, 1912 accepted as Epitonium Röding, 1798
- Genus Turriscala de Boury, 1890 † (7)
- Genus Variciscala de Boury, 1909 (1)
- Genus Viciniscala de Boury, 1909 accepted as Epitonium Röding, 1798
- Genus Violetta Iredale, 1929 accepted as Janthina Röding, 1798
- Family Ianthinidae accepted as Janthinidae Lamarck, 1822
- Family Iodeidae Leach, 1847 accepted as Epitoniidae S. S. Berry, 1910 (1812)
- Family Janthinidae Lamarck, 1822 accepted as Epitoniidae S. S. Berry, 1910 (1812)
- Family Nystiellidae Clench & R. D. Turner, 1952 accepted as Epitoniidae S. S. Berry, 1910 (1812)
- Family Recluziidae Iredale & McMichael, 1962 accepted as Epitoniidae S. S. Berry, 1910 (1812)
- Family Scalariidae Lamarck, 1812 accepted as Epitoniidae S. S. Berry, 1910 (1812)
- Family Scalidae H. Adams & A. Adams, 1853 accepted as Epitoniidae S. S. Berry, 1910 (1812)
- Family Stenacmidae Pilsbry, 1945 accepted as Epitoniidae S. S. Berry, 1910 (1812)
- Superfamily Eulimacea accepted as Eulimoidea R. A. Philippi, 1853
- Superfamily Orthonematoidea Nützel & Bandel, 2000 † (107)
- Superfamily Palaeostyloidea Wenz, 1938 † (17)
- Superfamily Peruneloidea Frýda & Bandel, 1997 † (3)
- Superfamily Soleniscoidea Knight, 1931 † (52)
- Superfamily Subulitoidea Lindström, 1884 † (11)
- Superfamily Triphoroidea J. E. Gray, 1847 (2 157)
- Family Acanthonematidae Wenz, 1938 †
- Family Ampezzanildidae Bandel, 1994 † (1)
- Family Aqabarellidae Alhejoj, Bandel & Al-Najjar, 2016 accepted as Tornidae Sacco, 1896 (1884)
- Family Coelostylinidae Cossmann, 1908 † (16)
- Family Lyocyclidae Thiele, 1925 (37)
- Family Plicatusidae Pan & Erwin, 2002 †
- Family Pragoscutulidae Frýda, 1998 †
- Family Pseudomelaniidae R. Hoernes, 1884 † (81)
- Family Spanionematidae A. N. Golikov & Starobogatov, 1987 †
- Family Spirostylidae Cossmann, 1909 †
- Family Trajanellidae Pchelintsev, 1951 † accepted as Pseudomelaniidae R. Hoernes, 1884 †
- Genus Boreioconus Guzhov, 2015 † (1)
- Genus Costasphaera Gründel & Nützel, 2015 † (1)
- Genus Dicolpus R. A. Philippi, 1887 †
- Genus Nixipileolus Guzhov, 2015 † (1)
- Genus Sassenfjordia Kaim, Hryniewicz, C. Little & Nakrem, 2017 † (1)
- Genus Spirocyclina Kittl, 1894 † accepted as Spirocyclus Wenz, 1938 †
- Genus Spirocyclus Wenz, 1938 †
- Order Littorinimorpha (17 171)
- Order Neogastropoda (23 713)
- Order Stenoglossa accepted as Neogastropoda
- Subclass Gastropoda incertae sedis (308)
- Subclass Heterobranchia (39 154)
- 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)
- 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