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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)
Superfamily Achatinoidea Swainson, 1840 (1 329)
Superfamily Streptaxoidea J. E. Gray, 1860 (1 571)
Family Artemonidae Bourguignat, 1890 accepted as Streptaxinae J. E. Gray, 1860
Family Diapheridae Panha & Naggs, 2010 (183)
Family Enneidae Bourguignat, 1883 accepted as Enneinae Bourguignat, 1883
Family Orthogibbidae Germain, 1921 accepted as Orthogibbinae Germain, 1921
Family Streptaxidae J. E. Gray, 1860 (1 388)
Subfamily Enneinae Bourguignat, 1883 (265)
Subfamily Gibbinae Steenberg, 1936 accepted as Orthogibbinae Germain, 1921
Subfamily Gonidominae Steenberg, 1936 accepted as Orthogibbinae Germain, 1921
Subfamily Gulellinae Rowson, 2024 (548)
Subfamily Marconiinae Schileyko, 2000 (49)
Subfamily Odontartemoninae Schileyko, 2000 (39)
Genus Artemonopsis Germain, 1908 (2)
Genus Colpanostoma Bourguignat, 1890 accepted as Tayloria Bourguignat, 1890
Species Colpanostoma leroyi Bourguignat, 1890 accepted as Tayloria leroyi (Bourguignat, 1890)
Genus Eustreptaxis L. Pfeiffer, 1878 accepted as Streptaxis J. E. Gray, 1837
Genus Gibbonsia Bourguignat, 1890 accepted as Tayloria Bourguignat, 1890
Genus Gigantaxis Tomlin, 1930 accepted as Tayloria Bourguignat, 1890
Genus Lamelliger Ancey, 1884 (3)
Genus Pseudogonaxis Thiele, 1932 (9)
Genus Somalitayloria Verdcourt, 1962 accepted as Tayloria (Somalitayloria) Verdcourt, 1962
Genus Tanzartemon Tattersfield & Rowson, 2011 (2)
Genus Tayloria Bourguignat, 1890 (23)
Subfamily Orthogibbinae Germain, 1921 (165)
Subfamily Primigulellinae Rowson, 2024 (41)
Subfamily Ptychotrematinae Pilsbry, 1919 accepted as Enneinae Bourguignat, 1883
Subfamily Streptaxinae J. E. Gray, 1860 (276)
Genus Campolaemus Pilsbry, 1892 (1)
Genus Goniodomulus Harzhauser & Neubauer, 2016 † (1)
Genus Huttonella L. Pfeiffer, 1856 accepted as Gulella (Huttonella) L. Pfeiffer, 1856
Genus Oppenheimiella Pfeffer, 1930 † accepted as Pfefferiola Harzhauser & Neubauer, 2021 †
Genus Panhartemis Siriboon, 2023 (2)
Genus Pfefferiola Harzhauser & Neubauer, 2021 † (1)
Family Streptostelidae Bourguignat, 1890 accepted as Enneinae Bourguignat, 1883
Suborder Elasmognatha accepted as Succineoidei
Suborder Helicina (21 626)
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