Between brackets is the number of accepted species
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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)
- Superfamily Helicoidea Rafinesque, 1815 (5 491)
- Family Ariantidae Mörch, 1864 accepted as Ariantinae Mörch, 1864
- Family Bradybaenidae Pilsbry, 1934 (1898) accepted as Camaenidae Pilsbry, 1895
- Family Calyciidae Iredale, 1941 accepted as Hadrinae Iredale, 1937
- Family Camaenidae Pilsbry, 1895 (2 898)
- Family Canariellidae Schileyko, 1991 (56)
- Family Cepolidae Ihering, 1909 (102)
- Family Chloritidae Iredale, 1938 accepted as Hadrinae Iredale, 1937
- Family Cochlicellidae Schileyko, 1972 accepted as Cochlicellini Schileyko, 1972
- Family Cochlicellinae Schileyko, 1972 accepted as Cochlicellini Schileyko, 1972
- Family Cochlostylidae Möllendorff, 1890 accepted as Helicostylinae Ihering, 1909 (1890)
- Family Echinichidae F. G. Thompson & Naranjo-García, 2012 accepted as Echinichinae F. G. Thompson & Naranjo-García, 2012
- Family Elonidae E. Gittenberger, 1977 (63)
- Family Epiphragmophoridae Hoffmann, 1928 (72)
- Family Eulotidae Möllendorff, 1898 accepted as Bradybaenini Pilsbry, 1934 (1898)
- Family Geomitridae C. R. Boettger, 1909 (402)
- Family Helicellidae Ihering, 1909 accepted as Hygromiidae Tryon, 1866
- Family Helicidae Rafinesque, 1815 (500)
- Family Helicodontidae Kobelt, 1904 (26)
- Family Helminthoglyptidae Pilsbry, 1939 accepted as Helminthoglyptinae Pilsbry, 1939
- Family Humboldtianidae Pilsbry, 1939 accepted as Humboldtianinae Pilsbry, 1939
- Family Hygromiidae Tryon, 1866 (460)
- Family Jacostidae Pilsbry, 1948 accepted as Helicellini Ihering, 1909
- Family Labyrinthidae Borrero, Sei, D. G. Robinson & Rosenberg, 2017 (58)
- Family Lampadiidae Winckworth, 1945 accepted as Labyrinthidae Borrero, Sei, D. G. Robinson & Rosenberg, 2017
- Family Leucochroidae Westerlund, 1886 accepted as Sphincterochilinae Zilch, 1960 (1886)
- Family Lysinoidae Hoffmann, 1928 accepted as Lysinoinae Hoffmann, 1928
- Family Monadeniidae H. Nordsieck, 1987 accepted as Monadeniinae H. Nordsieck, 1987
- Family Papuinidae Iredale, 1938 accepted as Hadrinae Iredale, 1937
- Family Pentataeniidae Mörch, 1864 accepted as Helicini Rafinesque, 1815
- Family Planispiridae Iredale, 1941 accepted as Hadrinae Iredale, 1937
- Family Pleurodontidae Ihering, 1912 (57)
- Family Polygyridae Pilsbry, 1895 (311)
- Family Rhagadidae Iredale, 1938 accepted as Hadrinae Iredale, 1937
- Family Sphincterochilidae Zilch, 1960 (1886) (41)
- Family Thysanophoridae Pilsbry, 1926 (42)
- Family Trichodiscinidae H. Nordsieck, 1987 (11)
- Family Trissexodontidae H. Nordsieck, 1987 (46)
- Family Xanthonychidae Strebel & Pfeffer, 1880 (345)
- Subfamily Echinichinae F. G. Thompson & Naranjo-García, 2012 (3)
- Subfamily Epiphragmophorinae Hoffmann, 1928 accepted as Epiphragmophoridae Hoffmann, 1928
- Subfamily Helminthoglyptinae Pilsbry, 1939 (235)
- Tribe Helminthoglyptini Pilsbry, 1939 (136)
- Tribe Sonorelicini B. Roth, 1996 accepted as Helminthoglyptini Pilsbry, 1939
- Tribe Sonorellini Pilsbry, 1939 (95)
- Genus Maricopella B. Roth, 1996 (1)
- Genus Masculus Pilsbry, 1939 accepted as Sonorella Pilsbry, 1900
- Genus Mohavelix S. S. Berry, 1943
- Genus Myotophallus Pilsbry, 1939 (1)
- Genus Sonoranax Pilsbry, 1939 accepted as Sonorella Pilsbry, 1900
- Genus Sonorella Pilsbry, 1900 (93)
- Subgenus Sonorella (Masculus) Pilsbry, 1939 accepted as Sonorella Pilsbry, 1900
- Subgenus Sonorella (Myotophallus) Pilsbry, 1939 accepted as Myotophallus Pilsbry, 1939
- Subgenus Sonorella (Sonoranax) Pilsbry, 1939 accepted as Sonorella Pilsbry, 1900
- Subgenus Sonorella (Sonorella) Pilsbry, 1900 accepted as Sonorella Pilsbry, 1900
- Species Sonorella aguafriensis Naranjo-Gracia & W. B. Miller, 1986
- Species Sonorella allynsmithi Gregg & W. B. Miller, 1969 accepted as Maricopella allynsmithi (Gregg & W. B. Miller, 1969)
- Species Sonorella ambigua Pilsbry & Ferriss, 1915
- Species Sonorella anchana S. S. Berry, 1948
- Species Sonorella animasensis Pilsbry, 1939
- Species Sonorella apache Pilsbry & Ferriss, 1915
- Species Sonorella argus Edson, 1912 accepted as Eremarionta argus (Edson, 1912)
- Species Sonorella arizonensis (Dall, 1895)
- Species Sonorella ashmuni Bartsch, 1904
- Species Sonorella baboquivariensis Pilsbry & Ferriss, 1915
- Species Sonorella bagnarai W. B. Miller, 1967
- Species Sonorella baileyi Bartsch, 1904 accepted as Sonorelix baileyi baileyi (Bartsch, 1904)
- Species Sonorella bartschi Pilsbry & Ferriss, 1915
- Species Sonorella bequaerti W. B. Miller, 1967
- Species Sonorella berryi Pilsbry & Ferriss, 1923 accepted as Sonorella baboquivariensis Pilsbry & Ferriss, 1915
- Species Sonorella betheli J. Henderson, 1914 accepted as Helminthoglypta traskii traskii (Newcomb, 1861)
- Species Sonorella bicipitis Pilsbry & Ferriss, 1910
- Species Sonorella binneyi Pilsbry & Ferriss, 1910
- Species Sonorella boreoccidentis Bequaert & W. B. Miller, 1973 accepted as Sonorella reederi W. B. Miller, 1984
- Species Sonorella bowiensis Pilsbry, 1905
- Species Sonorella bradshaveana W. B. Miller, 1984
- Species Sonorella burgessi Naranjo-García, 1988
- Species Sonorella caerulifluminis Pilsbry & Ferriss, 1919
- Species Sonorella cananea Naranjo-García, 1988
- Species Sonorella cayetanensis Pilsbry & Ferriss, 1919 accepted as Sonorella magdalenensis (Stearns, 1890)
- Species Sonorella christenseni Fairbanks & Reeder, 1980
- Species Sonorella clappi Pilsbry & Ferriss, 1915
- Species Sonorella coloradoensis (Stearns, 1891)
- Species Sonorella coltoniana Pilsbry, 1939
- Species Sonorella compar Pilsbry, 1919
- Species Sonorella cotis Pilsbry & Ferriss, 1919 accepted as Sonorella huachucana Pilsbry, 1905
- Species Sonorella dalli Bartsch, 1904
- Species Sonorella danielsi Pilsbry & Ferriss, 1910
- Species Sonorella delicata Pilsbry & Ferriss, 1919
- Species Sonorella dragoonensis Pilsbry & Ferriss, 1915
- Species Sonorella elizabethae Pilsbry & Ferriss, 1919 accepted as Sonorella huachucana Pilsbry, 1905
- Species Sonorella eremita Pilsbry & Ferriss, 1915
- Species Sonorella ferrissi Pilsbry, 1915
- Species Sonorella fisheri Bartsch, 1904 accepted as Helminthoglypta fisheri (Bartsch, 1904)
- Species Sonorella flora Pilsbry, 1915
- Species Sonorella fragilis Pilsbry, 1939 accepted as Myotophallus rooseveltianus (S. S. Berry, 1917)
- Species Sonorella franciscana Pilsbry & Ferriss, 1919
- Species Sonorella galiurensis Pilsbry & Ferriss, 1919
- Species Sonorella goldmani Bartsch, 1904
- Species Sonorella grahamensis Pilsbry & Ferriss, 1919
- Species Sonorella granulatissima Pilsbry, 1902
- Species Sonorella greggi W. B. Miller, 1967
- Species Sonorella hachitana (Dall, 1895)
- Species Sonorella hesterna Pilsbry & Ferriss, 1919 accepted as Sonorella sabinoensis Pilsbry & Ferriss, 1919
- Species Sonorella hinkleyi Pilsbry & Ferriss, 1919 accepted as Sonorella magdalenensis (Stearns, 1890)
- Species Sonorella huachucana Pilsbry, 1905
- Species Sonorella huecoensis Gilbertson & Metcalf, 2005
- Species Sonorella imitator Gregg & W. B. Miller, 1974
- Species Sonorella imperatrix Pilsbry, 1939
- Species Sonorella imperialis Pilsbry & Ferriss, 1923
- Species Sonorella insignis Pilsbry & Ferriss, 1919
- Species Sonorella linearis Pilsbry & Ferriss, 1923 accepted as Sonorella magdalenensis (Stearns, 1890)
- Species Sonorella lioderma Pilsbry, 1904
- Species Sonorella lohrii [sic] accepted as Greggelix loehrii (Gabb, 1868)
- Species Sonorella macrophallus Fairbanks & Reeder, 1980
- Species Sonorella madreana Naranjo-García, 1989
- Species Sonorella magdalenensis (Stearns, 1890)
- Species Sonorella marmorarius Pilsbry & Ferriss, 1919 accepted as Sonorella sabinoensis Pilsbry & Ferriss, 1919
- Subspecies Sonorella marmorarius imula Pilsbry & Ferriss, 1919 accepted as Sonorella sabinoensis Pilsbry & Ferriss, 1919
- Subspecies Sonorella marmorarius limifontis Pilsbry & Ferriss, 1919 accepted as Sonorella sabinoensis Pilsbry & Ferriss, 1919
- Species Sonorella meadi W. B. Miller, 1966
- Species Sonorella mearnsi Bartsch, 1904
- Species Sonorella merrilli Bartsch, 1904 accepted as Herpeteros merrilli (Bartsch, 1904)
- Species Sonorella metcalfi W. B. Miller, 1976
- Species Sonorella micra Pilsbry & Ferriss, 1910
- Species Sonorella micromphala Pilsbry, 1939
- Species Sonorella milleri Christensen & Reeder, 1981
- Species Sonorella montana Pilsbry & Ferriss, 1919 accepted as Sonorella walkeri Pilsbry & Ferriss, 1915
- Species Sonorella montezuma Pilsbry & Ferriss, 1919 accepted as Sonorella sitiens Pilsbry & Ferriss, 1915
- Species Sonorella mormonorum Pilsbry, 1948
- Species Sonorella mustang Pilsbry & Ferriss, 1919
- Species Sonorella naranjoae Gilbertson & T. R. Van Devender, 2019
- Species Sonorella neglecta Gregg, 1951
- Species Sonorella nelsoni Bartsch, 1904
- Species Sonorella nixoni W. B. Miller, 1967
- Species Sonorella odorata Pilsbry & Ferriss, 1919
- Species Sonorella optata Pilsbry & Ferriss, 1910
- Species Sonorella orientis Pilsbry, 1936
- Species Sonorella painteri B. K. Lang & Gilbertson, 2010
- Species Sonorella papagorum Pilsbry & Ferriss, 1915
- Species Sonorella parva Pilsbry, 1905
- Species Sonorella patagonica Pilsbry & Ferriss, 1919 accepted as Sonorella huachucana Pilsbry, 1905
- Species Sonorella pedregosensis Gilbertson & W. R. Radke, 2006
- Species Sonorella peloncillensis Pilsbry, 1915
- Species Sonorella peninsularis Pilsbry, 1916 accepted as Herpeteros peninsularis (Pilsbry, 1916)
- Species Sonorella pennelli Pilsbry, 1948
- Species Sonorella perhirsuta W. B. Miller, 1967
- Species Sonorella praesidii (Pilsbry & Ferriss, 1919)
- Species Sonorella pratti Naranjo-García, 1988
- Species Sonorella reederi W. B. Miller, 1984
- Species Sonorella rinconensis Pilsbry & Ferriss, 1910
- Species Sonorella rooseveltiana S. S. Berry, 1917 accepted as Myotophallus rooseveltianus (S. S. Berry, 1917)
- Species Sonorella rosemontensis Pilsbry, 1939 accepted as Sonorella walkeri Pilsbry & Ferriss, 1915
- Species Sonorella rothi Naranjo-García, 1988
- Species Sonorella rowelli (Newcomb, 1865) accepted as Eremarionta rowelli (Newcomb, 1865)
- Species Sonorella russelli W. B. Miller, 1984
- Species Sonorella sabinoensis Pilsbry & Ferriss, 1919
- Species Sonorella santaritana Pilsbry & Ferriss, 1915
- Species Sonorella sasabe Naranjo-García, 1989
- Species Sonorella seri Naranjo-García, 1988
- Species Sonorella simmonsi W. B. Miller, 1966
- Species Sonorella sitiens Pilsbry & Ferriss, 1915
- Species Sonorella strongiana S. S. Berry, 1948
- Species Sonorella superstitionis Pilsbry, 1939
- Species Sonorella todseni W. B. Miller, 1976
- Species Sonorella torreonica Naranjo-García, 1989
- Species Sonorella tortillita Pilsbry & Ferriss, 1919
- Species Sonorella tryoniana Pilsbry & Ferriss, 1923
- Species Sonorella tumacacori Pilsbry & Ferriss, 1919 accepted as Sonorella magdalenensis (Stearns, 1890)
- Species Sonorella tumamocensis Pilsbry & Ferriss, 1915 accepted as Sonorella magdalenensis (Stearns, 1890)
- Species Sonorella ultima Pilsbry, 1916 accepted as Eremarionta ultima (Pilsbry, 1916)
- Species Sonorella verdensis Pilsbry, 1939 accepted as Sonorella ambigua verdensis Pilsbry, 1939
- Species Sonorella vespertina Pilsbry & Ferriss, 1915
- Species Sonorella virilis Pilsbry, 1905
- Species Sonorella walcottiana Bartsch, 1903 accepted as Cahuillus indioensis wolcottianus (Bartsch, 1903)
- Species Sonorella walkeri Pilsbry & Ferriss, 1915
- Species Sonorella walteri Naranjo-García, 1989
- Species Sonorella waltoni W. B. Miller, 1968
- Species Sonorella wolcottiana Bartsch, 1904 accepted as Cahuillus indioensis wolcottianus (Bartsch, 1903)
- Species Sonorella xanthenes Pilsbry & Ferriss, 1923
- Genus Glypterpes Pilsbry, 1893 † (3)
- Genus Mesoglypterpes Yen, 1952 † (1)
- Genus Pseudolisinoe Wenz, 1923 † accepted as Glypterpes Pilsbry, 1893 †
- Subfamily Humboldtianinae Pilsbry, 1939 (63)
- Subfamily Lysinoinae Hoffmann, 1928 (20)
- Subfamily Metostracinae H. Nordsieck, 1987 accepted as Metostracini H. Nordsieck, 1987
- Subfamily Monadeniinae H. Nordsieck, 1987 (19)
- Subfamily Xanthonychinae Strebel & Pfeffer, 1880 (5)
- Tribe Canariellini Schileyko, 1991 accepted as Canariellidae Schileyko, 1991
- Genus Laxecostula Harzhauser & Neubauer, 2020 † (1)
- Superfamily Sagdoidea Pilsbry, 1895 (199)
- Infraorder Limacoidei (4 251)
- Infraorder Oleacinoidei (497)
- Infraorder Orthalicoidei (1 578)
- 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
