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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)
Infraclass "Lower Heterobranchia" (1 137)
Infraclass Euthyneura (37 433)
Subterclass Acteonimorpha (411)
Subterclass Ringipleura (2 917)
Subterclass Tectipleura (34 105)
Superorder Acochlidiimorpha (48)
Superorder Ascoglossa accepted as Sacoglossa
Superorder Basommatophora accepted as Hygrophila
Superorder Eupulmonata (25 569)
Order Aillyida accepted as Achatinina
Order Ellobiida (579)
Order Gymnomorpha accepted as Systellommatophora
Order Stylommatophora (24 766)
Suborder Achatinina (2 900)
Suborder Elasmognatha accepted as Succineoidei
Suborder Helicina (21 626)
Infraorder Arionoidei (140)
Infraorder Clausilioidei (1 859)
Infraorder Helicina incertae sedis (3 210)
Infraorder Helicoidei (5 690)
Infraorder Limacoidei (4 251)
Infraorder Oleacinoidei (497)
Infraorder Orthalicoidei (1 578)
Superfamily Bulimuloidea Tryon, 1867 accepted as Orthalicoidea E. von Martens, 1860
Superfamily Orthalicoidea E. von Martens, 1860 (1 578)
Family Amphibulimidae P. Fischer, 1873 (109)
Family Bothriembryontidae Iredale, 1937 (168)
Family Bulimulidae Tryon, 1867 (940)
Family Cyclodontinidae Salvador & Breure, 2023 (110)
Family Liguidae Pilsbry, 1891 accepted as Orthalicidae E. von Martens, 1860
Family Megaspiridae Pilsbry, 1904 (58)
Genus Callionepion Pilsbry & Vanatta, 1899 (1)
Genus Koltrora Simone, 2024 (1)
Genus Kora Simone, 2012 (11)
Genus Megaspira I. Lea, 1836 (7)
Species Megaspira adenticulata Daniel, Ovando & S. B. Santos, 2022
Species Megaspira cylindrica R. B. Newton & G. F. Harris, 1894 † accepted as Palaeostoa cylindrica (R. B. Newton & G. F. Harris, 1894) †
Species Megaspira elata (A. Gould, 1847)
Species Megaspira elatior (Spix, 1827)
Species Megaspira gracilis Pilsbry, 1904
Species Megaspira iheringi Pilsbry, 1925
Species Megaspira monodonta R. B. Newton & G. F. Harris, 1894 † accepted as Palaeostoa multispirata (R. B. Newton & G. F. Harris, 1894) †
Species Megaspira pilsbryi Rehder, 1945
Species Megaspira robusta Pilsbry, 1904
Species Megaspira ruschenbergiana I. Lea, 1836 accepted as Megaspira elatior (Spix, 1827)
Genus Orphnus Albers, 1850 accepted as Thaumastus E. von Martens, 1860
Genus Pachytholus Strebel, 1909 accepted as Thaumastus E. von Martens, 1860
Genus Paeniscutalus Wurtz, 1947 (1)
Genus Pyrgelix H. Beck, 1837 accepted as Megaspira I. Lea, 1836
Genus Tatutor Jousseaume, 1887 accepted as Thaumastus E. von Martens, 1860
Genus Thaumastus E. von Martens, 1860 (37)
Genus Tholus Strebel, 1909 accepted as Thaumastus E. von Martens, 1860
Family Orthalicidae E. von Martens, 1860 (108)
Family Placostylidae Pilsbry, 1946 accepted as Placostylinae Pilsbry, 1946
Family Simpulopsidae Schileyko, 1999 (61)
Family Tomogeridae Jousseaume, 1877 (24)
Infraorder Partuloinei accepted as Pupilloidei
Infraorder Pupilloidei (3 436)
Infraorder Rhytidoidei (581)
Infraorder Sagdoinei accepted as Helicoidei
Infraorder Succineoidei (384)
Suborder Orthurethra accepted as Pupilloidei
Suborder Scolodontina (165)
Suborder Sigmurethra accepted as Helicina
Suborder Stylommatophora incertae sedis (75)
Order Systellommatophora (224)
Superorder Hygrophila (2 005)
Superorder Pneumopulmonata
Superorder Pylopulmonata (4 285)
Superorder Sacoglossa (391)
Superorder Siphonarimorpha (163)
Order Anaspidea accepted as Aplysiida
Order Aplysiida (101)
Order Aplysiomorpha accepted as Aplysiida
Order Archaeopulmonata accepted as Siphonarioidea Gray, 1827
Order Bullomorpha accepted as Cephalaspidea
Order Cephalaspidea (1 034)
Order Heterostropha accepted as Pyramidellidae J. E. Gray, 1840
Order Pteropoda (414)
Order Runcinacea accepted as Runcinida
Order Runcinida (80)
Order Tectibranchiata
Order Thecosomata
Order Umbraculida (15)
Superorder Euthyneura incertae sedis
Infraclass Heterobranchia incertae sedis (478)
Infraclass Mesoneura (108)
Infraclass Opisthobranchia
Infraclass Pulmonata
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