Phylum Mollusca
Class Gastropoda
Subclass Heterobranchia
Infraclass Euthynerua
Cohort Tectipleura
Subcohort Panpulmonata
Superorder Eupulmonata
Order Ellobiida
Superfamily Ellobioidea L. Pfeiffer, 1854 (1822)
Family Ellobiidae L. Pfeiffer, 1854 (1822)
Subfamily Carychiinae Jeffreys, 1839
Genus Carychium O. F. Müller, 1774
Carychium exiguum (Say, 1822)
Carychium exile H. C. Lea, 1842
Carychium minimum O. F. Müller, 1774 ◆
Carychium nannodes G.H. Clapp, 1905
Carychium occidentale Pilsbry, 1891
Carychium tridentatum (Risso, 1826) ◆
Subfamily Melampodinae Stimpson, 1851 (1850)
Genus Melampus Montfort, 1810
Subgenus Melampus Montfort, 1810
Melampus (Melampus) bidentatus Say, 1822
Subfamily Pythiinae Odhner, 1925 (1880)
Genus Myosotella Monterosato, 1906
Myosotella myosotis (Draparnaud, 1801) ◆
Order Stylommatophora
Suborder Achatinina
Superfamily Achatinoidea Swainson, 1840
Family Achatinidae Swainson, 1840
Subfamily Cecilioidinae Mörch, 1864
Genus Cecilioides A. Férussac, 1814
Subgenus Cecilioides A. Férussac, 1814
Cecilioides (Cecilioides) acicula (O. F. Müller, 1774) ◆
Suborder Helicina
Infraorder uncertain
Superfamily Testacelloidea Gray, 1840
Family Testacellidae Gray, 1840
Genus Testacella Cuvier, 1800
Subgenus Testacella Cuvier, 1800
Testacella (Testacella) haliotidea Draparnaud, 1801 ◆
Infraorder Succineoidei
Superfamily Succineoidea Beck, 1837
Family Succineidae Beck, 1837
Subfamily Succineinae Beck, 1837
Genus Novisuccinea Schileyko & Likharev, 1986
Novisuccinea ovalis (Say, 1817)
Novisuccinea strigata (L. Pfeiffer, 1855)
Genus Oxyloma Westerlund, 1885
Subgenus Oxyloma Westerlund, 1885
…
Subgenus Neoxyloma Pilsbry, 1948 [valid]
…
Genus Succinea Draparnaud, 1801
Subgenus Succinea Draparnaud, 1801
Succinea wilsonii
…
Subgenus uncertain
…
Genus Succinella Mabille, 1871
Succinella oblonga (Draparnaud, 1801) ◆
Subfamily Catinellinae Odhner, 1950
Genus Mediappendix Pilsbry, 1948
Mediappendix vermeta
Infraorder Pupilloidei
Superfamily Pupilloidea Turton, 1831
Family Pupillidae Turton, 1831
Genus Pupilla Leach in Fleming, 1828
Subgenus Pupilla Leach in Fleming, 1828
Pupilla (Pupilla) alaskensis Nekola & Coles in Nekola et al., 2014
Pupilla (Pupilla) blandii Morse, 1865
Pupilla (Pupilla) hudsoniana Nekola & Coles in Nekola et al., 2014
Pupilla (Pupilla) muscorum (Linnaeus, 1758) ◆
Genus Pupoides L. Pfeiffer, 1854
Subgenus Pupoides L. Pfeiffer, 1854
Pupoides (Pupoides) albilabris (C. B. Adams, 1841)
Family Cochlicopidae Pilsbry, 1900
Genus Cochlicopa A. Férussac, 1821
Subgenus Cochlicopa A. Férussac, 1821
Cochlicopa lubrica (O. F. Müller, 1774)
Cochlicopa lubricella Porro, 1838
Cochlicopa morseana (Doherty, 1878)
Family Gastrocoptidae Pilsbry, 1918
Genus Gastrocopta Wollaston, 1878
Subgenus Albinula Sterki, 1892
Gastrocopta (Albinula) armifera (Say, 1821)
Gastrocopta (Albinula) contracta (Say, 1822)
Gastrocopta (Albinula) holzingeri (Sterki, 1889)
Gastrocopta (Albinula) similis (Sterki, 1909)
Subgenus Privatula Sterki, 1893
Gastrocopta (Privatula) corticaria (Say, 1817)
Subgenus Vertigopsis Sterki, 1893
Gastrocopta (Vertigopsis) pentodon (Say, 1822)
Gastrocopta (Vertigopsis) tappaniana (C.B. Adams, 1841)
Family Lauriidae Steenberg, 1925
Genus Lauria Gray, 1840
Subgenus Lauria Gray, 1840
Lauria cylindracea (Mendes Da Costa, 1778) ◆
Family Strobilopsidae Wenz, 1915
Genus Strobilops Pilsbry, 1893
Subgenus Strobilops Pilsbry, 1893
Strobilops (Strobilops) aeneus Pilsbry, 1926
Strobilops (Strobilops) affinis Pilsbry, 1893
Strobilops (Strobilops) labyrinthicus (Say, 1817)
Family Truncatellinidae Steenberg, 1925
Genus Columella Westerlund, 1878
Columella columella (G. von Martens, 1830)
Columella edentula (Draparnaud, 1805)
Family Valloniidae Morse, 1864
Genus Planogyra Morse, 1864
Planogyra asteriscus (Morse, 1857)
Planogyra clappi (Pilsbry, 1898)
Genus Vallonia Risso, 1826
Vallonia costata (O. F. Müller, 1774)
Vallonia cyclophorella Sterki, 1892
Vallonia excentrica Sterki in Pilsbry, 1893
Vallonia gracilicosta Reinhardt, 1883
Vallonia parvula Sterki in Pilsbry, 1893
Vallonia pulchella (O. F. Müller, 1774)
Vallonia terraenovae Gerber, 1996
Genus Zoogenetes Morse, 1864
Zoogenetes harpa (Say, 1824)
Family Vertiginidae Fitzinger, 1833
Subfamily Vertigininae Fitzinger, 1833
Genus Vertigo O. F. Müller, 1774
Subgenus Vertigo O. F. Müller, 1774
Vertigo (Vertigo) arthuri E. von Martens, 1882
Vertigo (Vertigo) bollesiana (Morse, 1865)
Vertigo (Vertigo) gouldii (A. Binney, 1843)
Vertigo (Vertigo) hannai Pilsbry, 1919
Vertigo (Vertigo) nylanderi Sterki, 1909
Vertigo (Vertigo) genesioides Nekola et al., 2018
Vertigo (Vertigo) oughtoni Pilsbry, 1948
Subgenus Boreovertigo Nekola et al., 2018
Vertigo (Boreovertigo) andrusiana Pilsbry, 1899
Vertigo (Boreovertigo) cf. hoppii (Möller, 1842)
Vertigo (Boreovertigo) modesta (Say, 1824)
Vertigo (Boreovertigo) modesta castanea Pilsbry & Vanatta, 1900
Vertigo (Boreovertigo) coloradensis (Cockerell, 1891)
Vertigo (Boreovertigo) cristata Sterki in Pilsbry, 1919
Vertigo (Boreovertigo) pisewensis Nekola et al., 2018
Vertigo (Boreovertigo) ronnebyensis (Westerlund, 1871)
Vertigo (Boreovertigo) ultima Pilsbry, 1919
Subgenus Vertilla Moquin-Tandon, 1855
Vertigo (Vertilla) clappi Brooks & Hunt, 1936
Subgenus Alaea Jeffreys, 1830
Vertigo (Alaea) binneyana Sterki, 1890
Vertigo (Alaea) lilljeborgi vinlandica Nekola et al., 2018
Vertigo (Alaea) milium (Gould, 1840)
Vertigo (Alaea) perryi Sterki, 1905
Vertigo (Alaea) ventricosa (Morse, 1865)
Vertigo (Alaea) morsei Sterki, 1894
Vertigo (Alaea) ovata (Say, 1822)
Subgenus Staurodon Lowe, 1852
Vertigo (Staurodon) rowellii (Newcomb, 1862)
Subgenus Isthmia Gray, 1821
Vertigo (Isthmia) pygmaea (Draparnaud, 1801) ◆
Vertigo (Isthmia) tridentata Wolf, 1870
Infraorder Arionoidei
Superfamily Arionoidea Gray, 1840
Family Arionidae Gray, 1840
Genus Arion A. Férussac, 1819
Subgenus Arion A. Férussac, 1819
Arion (Arion) rufus (Linnaeus, 1758)
Subgenus Carinarion P. Hesse, 1926
Arion (Carinarion) circumscriptus Johnston, 1828
Arion (Carinarion) silvaticus Lohmander, 1937
Arion (Carinarion) fasciatus (Nilsson, 1823)
Subgenus Kobeltia Seibert, 1873
Arion (Kobeltia) distinctus Mabille, 1868
Arion (Kobeltia) hortensis A. Férussac in A. Férussac & Deshayes, 1819
Arion (Kobeltia) intermedius Normand, 1852
Subgenus Mesarion P. Hesse, 1926
Arion (Mesarion) subfuscus (Draparnaud, 1805)
Arion (Mesarion) fuscus (Draparnaud, 1801)
Family Anadenidae Pilsbry, 1948
Genus Kootenaia W. P. Leonard, Chichester, Baugh & Wilke, 2003
Kootenaia burkei W. P. Leonard, Chichester, Baugh & Wilke, 2003
Genus Prophysaon Bland & W. G. Binney, 1873
Subgenus Prophysaon Bland & W. G. Binney, 1873
Prophysaon (Prophysaon) andersonii (J. G. Cooper, 1872)
Prophysaon (Prophysaon) coeruleum Cockerell, 1890
Prophysaon (Prophysaon) foliolatum (Gould in W. G. Binney, 1851)
Subgenus Mimetarion Pilsbry, 1948
Prophysaon (Mimetarion) vanattae Pilsbry, 1948
Family Ariolimacidae Pilsbry & Vanatta, 1898
Subfamily Ariolimacinae Pilsbry & Vanatta, 1898
Genus Ariolimax Mörch, 1860
Subgenus Ariolimax Mörch, 1860
Ariolimax (Ariolimax) columbianus (Gould in A. Binney, 1851)
Genus Magnipelta Pilsbry, 1953
Magnipelta mycophaga Pilsbry, 1953
Subfamily Zacoleinae Webb, 1959
Genus Zacoleus Pilsbry, 1903
Zacoleus idahoensis Pilsbry, 1903
Unplaced Helicina — Position within Helicina uncertain but related to Arionoidea and Limacoidei
Family Helicodiscidae H. B. Baker, 1927
Genus Helicodiscus Morse, 1864
Subgenus Helicodiscus Morse, 1864
Helicodiscus (Helicodiscus) parallelus (Say, 1821)
Helicodiscus (Helicodiscus) shimeki Hubricht, 1962
Genus Lucilla R. T. Lowe, 1852
Lucilla singleyana (Pilsbry, 1889)
Unplaced Helicina — Position within Helicina uncertain
Superfamily Punctoidea Morse, 1864
Family Punctidae Morse, 1864
Genus Paralaoma Iredale, 1913
Paralaoma servilis (Shuttleworth, 1852)
Genus Punctum Morse, 1864
Subgenus Punctum Morse, 1864
Punctum (Punctum) californicum Pilsbry, 1898
Punctum (Punctum) minutissimum (I. Lea, 1841)
Punctum (Punctum) randolphii (Dall, 1895)
Infraorder Limacoidei
Superfamily Limacoidea Batsch, 1789
Family Limacidae Batsch, 1789
Subfamily Limacinae Batsch, 1789
Genus Ambigolimax Pollonera, 1887
Ambiguolimax valentianus (A. Férussac in A. Férussac & Deshayes, 1822) ◆
Genus Lehmannia Heynemann, 1863
Lehmannia marginata (O. F. Müller, 1774) ◆
Genus Limacus Lehmann, 1864
Limacus flavus (Linnaeus, 1758) ◆
Genus Limax Linnaeus, 1758
Limax maximus Linnaeus, 1758 ◆
Family Agriolimacidae H. Wagner, 1935
Subfamily Agriolimacinae H. Wagner, 1935
Genus Deroceras Rafinesque, 1820
Subgenus Deroceras Rafinesque, 1820
Deroceras (Deroceras) invadens Reise, Hutchinson, Schunack & Schlitt, 2011 ◆
Deroceras (Deroceras) laeve (O. F. Müller, 1774)
Deroceras (Deroceras) reticulatum (O. F. Müller, 1774) ◆
Family Boettgerillidae Wiktor & I. M. Likharev, 1979
Genus Boettgerilla Simroth, 1910
Boettgerilla pallens Simroth, 1912 ◆
Family Vitrinidae Fitzinger, 1833
Genus Vitrina Draparnaud, 1801
Vitrina angelicae Beck, 1837
Vitrina pellucida (O. F. Müller, 1774)
Superfamily Gastrodontoidea Tryon, 1866
Family Gastrodontidae Tryon, 1866
Genus Aegopinella Lindholm, 1927
Aegopinella nitidula (Draparnaud, 1805) ◆
Genus Glyphyalinia E. von Martens, 1892
Subgenus Glyphyalinia E. von Martens, 1892
Glyphyalinia (Glyphyalinia) indentata (Say, 1823)
Subgenus Glyphyalops H. B. Baker, 1928
Glyphyalinia (Glyphyalops) rhoadsi (Pilsbry, 1899)
Genus Mesomphix Rafinesque, 1819
Subgenus Omphix Pilsbry, 1911
Mesomphix (Omphix) inornatus (Say, 1822)
Subgenus Omphalina Rafinesque, 1831
Mesomphix (Omphalina) cupreus (Rafinesque, 1831)
Genus Perpolita H. B. Baker, 1928
Perpolita binneyana (Morse, 1864)
Perpolita electrina (Gould, 1841)
Genus Striatura Morse, 1864
Subgenus Striatura Morse, 1864
Striatura (Striatura) milium (Morse, 1859)
Subgenus Pseudohyalina Morse, 1864
Striatura (Pseudohyalina) exigua (Stimpson, 1850)
Striatura (Pseudohyalina) pugetensis (Dall, 1895)
Subgenus Striaturops H. B. Baker, 1928
Striatura (Striaturops) ferrea Morse, 1864
Genus Ventridens W.G. Binney & Bland, 1869
Subgenus Ventridens W.G. Binney & Bland, 1869
Ventridens (Ventridens) suppressus (Say, 1829)
Subgenus Ventricallus Pilsbry, 1946
Ventridens (Ventricallus) intertextus (A. Binney, 1841)
Ventridens (Ventricallus) ligera (Say, 1821)
Genus Zonitoides Lehmann, 1862
Subgenus Zonitoides Lehmann, 1862
Zonitoides (Zonitoides) arboreus (Say, 1817)
Zonitoides (Zonitoides) nitidus (O. F. Müller, 1774)
Family Oxychilidae Hesse, 1827
Subfamily Oxychilinae Hesse, 1827
Genus Oxychilus Fitzinger, 1833
Subgenus Oxychilus Fitzinger, 1833
Oxychilus (Oxychilus) alliarius (Miller 1822) ◆
Oxychilus (Oxychilus) cellarius (O. F. Müller, 1774) ◆
Oxychilus (Oxychilus) draparnaudi (Beck, 1837) ◆
Family Pristilomatidae Cockerell, 1891
Genus Hawaiia Gude, 1911
Hawaiia minuscula (A. Binney, 1841)
Genus Paravitrea Pilsbry, 1898
Subgenus Paravitreops H. B. Baker, 1928
Paravitrea (Paravitreops) multidentata (A. Binney, 1841)
Genus Pristiloma Ancey, 1887
Subgenus Priscovitrea H. B. Baker, 1931
Pristiloma (Priscovitrea) wascoense (Hemphill, 1911)
Subgenus Priscovitreops H. B. Baker, 1931
Pristiloma (Priscovitreops) johnsoni (Dall, 1895)
Subgenus Pristinoides H. B. Baker, 1931
Pristiloma (Pristinoides) lansingi (Bland, 1875)
Pristiloma (Pristinoides) stearnsii (Bland, 1875)
Subgenus Pristinopsis H. B. Baker, 1931
Pristiloma (Pristinopsis) crateris Pilsbry, 1946
Pristiloma (Pristinopsis) arcticum (Lehnert, 1884)
Genus Vitrea Fitzinger, 1833
Vitrea contracta (Westerlund, 1871) ◆
Superfamily Trochomorphoidea Mörch, 1864
Family Euconulidae H. B. Baker, 1928
Subfamily Euconulidae H. B. Baker, 1928
Genus Euconulus Reinhardt, 1833
Subgenus Euconulus Reinhardt, 1833
Euconulus (Euconulus) alderi (Gray, 1840)
Euconulus (Euconulus) fresti Horsáková, Nekola & Horsák, 2020
Euconulus (Euconulus) fulvus egenus (Say, 1825)
Subgenus Euconulops H. B. Baker, 1928
Euconulus (Euconulops) polygyratus (Pilsbry, 1899)
Genus Guppya Mörch, 1867
Guppya sterkii Dall, 1888)
Infraorder Oleacinoidei
Superfamily Haplotrematoidea H. B. Baker, 1925
Family Haplotrematidae H. B. Baker, 1925
Subfamily Haplotrematinae H. B. Baker, 1925
Genus Ancotrema H. B. Baker, 1931
Ancotrema hybridum (Ancey, 1888)
Ancotrema sportella (Gould, 1846)
Genus Haplotrema Ancey, 1881
Subgenus Geomene Pilsbry, 1927
Haplotrema (Geomene) concavum (Say, 1821)
Subgenus Ancomena H. B. Baker, 1931
Haplotrema (Ancomena) vancouverense (I. Lea, 1839)
Infraorder uncertain: “close to infraorder Helicoidei”
Superfamily Discoidea Thiele, 1931 (1866)
Family uncertain — incertae sedis
Genus Radiodomus H. B. Baker, 1930
Radiodomus abietum (H. B. Baker, 1930)
Family Discidae Thiele, 1931 (1866)
Genus Anguispira Morse, 1864
Subgenus Anguispira Morse, 1864
Anguispira (Anguispira) alternata (Say, 1817)
Subgenus Zonodiscus Pilsbry, 1948
Anguispira (Zonodiscus) kochi kochi (L. Pfeiffer, 1846)
Anguispira (Zonodiscus) kochi occidentalis (E. von Martens, 1882)
Genus Discus Fitzinger, 1833
Subgenus Antediscus H. B. Baker in Pilsbry, 1948
Discus (Antediscus) shimekii (Pilsbry, 1890)
Subgenus Discus Fitzinger, 1833
Discus (Discus) patulus (Deshayes, 1830)
Discus (Discus) whitneyi (Newcomb, 1864)
Subgenus Gonyodiscus Fitzinger, 1833
Discus (Gonyodiscus) rotundatus (O. F. Müller, 1774) ◆
Family Oreohelicidae Pilsbry, 1939
Genus Oreohelix Pilsbry, 1904
Oreohelix cooperi (W.G. Binney, 1858)
Oreohelix strigosa (Gould, 1846)
Oreohelix subrudis (Reeve, 1854)
Infraorder Helicoidei
Superfamily Helicoidea Rafinesque, 1815
Family Helicidae Rafinesque, 1815
Subfamily Ariantinae Mörch, 1864
Genus Arianta Leach in Turton, 1831
Arianta arbustorum (Linnaeus, 1758) ◆
Subfamily Helicinae Rafinesque, 1815
Tribe Helicini Rafinesque, 1815
Genus Caucasotachea C. R. Boettger, 1909
Caucasotachea vindobonensis (C. Pfeiffer, 1828) ◆
Genus Cepaea Held, 1837
Subgenus Cepaea Held, 1837
Cepaea (Cepaea) hortensis (O. F. Müller, 1774)
Cepaea (Cepaea) nemoralis (Linnaeus, 1758) ◆
Genus Helix Linnaeus, 1758
Helix pomatia Linnaeus, 1758 ◆
Family Geomitridae C. Boettger, 1909
Subfamily Helicellinae Ihering, 1909
Tribe Helicopsini H. Nordsieck, 1987
Genus Xerolenta Monterosato, 1892
Xerolenta obvia (Menke, 1828) ◆
Family Hygromiidae Tryon, 1866
Subfamily Trochulininae Lindholm, 1927
Tribe Trochulini Lindholm, 1927
Genus Trochulus Chemnitz, 1786
Trochulus hispidus (Linnaeus, 1758) ◆
Trochulus striolatus (C. Pfeiffer, 1828) ◆
Family Polygyridae Pilsbry, 1895
Subfamily Triodopsinae Pilsbry, 1940
Tribe Triodopsini Pilsbry, 1940
Genus Triodopsis Rafinesque, 1819
Subgenus Triodopsis Rafinesque, 1819
Triodopsis (Triodopsis) tridentata (Say, 1817)
Subgenus Shelfordorbis Webb, 1959
Triodopsis (Shelfordorbis) vulgata Pilsbry, 1940
Genus Webbhelix Emberton, 1988
Webbhelix multilineata (Say, 1821)
Genus Xolotrema Rafinesque, 1819
Subgenus Xolotrema Rafinesque, 1819
Xolotrema (Xolotrema) denotatum (A. Férussac in A. Férussac & Deshayes, 1823)
Tribe Allogonini Emberton, 1995
Genus Allogona Pilsbry, 1939
Subgenus Allogona Pilsbry, 1939
Allogona (Allogona) profunda (Say, 1821)
Subgenus Dysmedoma Pilsbry, 1939
Allogona (Dysmedoma) ptychophora (A.D. Brown, 1870)
Allogona (Dysmedoma) townsendiana (I. Lea, 1839)
Genus Cryptomastix Pilsbry, 1939
Subgenus Cryptomastix Pilsbry, 1939
Cryptomastix (Cryptomastix) devia (Gould, 1846)
Cryptomastix (Cryptomastix) mullani (Bland & Cooper, 1861)
Tribe Mesodontini Tryon, 1866
Genus Inflectarius Pilsbry, 1940
Subgenus Inflectarius Pilsbry, 1940
Inflectarius (Inflectarius) inflectus (Say, 1821)
Genus Mesodon A. Férussac, 1821
Subgenus Appalachina Pilsbry, 1940
Mesodon (Appalachina) sayana (Pilsbry in Pilsbry & Ferriss, 1906)
Subgenus Mesodon A. Férussac, 1821
Mesodon (Mesodon) thyroidus (Say, 1817)
Subgenus Aphalogona Webb, 1954
Mesodon (Aphalogona) zaletus (A. Binney, 1837)
Genus Neohelix Ihering, 1892
Subgenus Neohelix Ihering, 1892
Neohelix (Neohelix) albolabris (Say, 1817)
Subgenus Asamiorbis Emberton, 1995
Neohelix (Asamiorbis) dentifera (A. Binney, 1837)
Genus Patera Albers, 1850
Subgenus Patera Albers, 1850
Patera (Patera) appressa (Say, 1821) ◆
Subgenus Ragsdaleorbis Webb, 1954
Patera (Ragsdaleorbis) pennsylvanica (Green, 1827)
Tribe Stenotrematini Emberton, 1995
Genus Euchemotrema Archer, 1939
Euchemotrema fraternum (Say, 1824)
Euchemotrema leaii (A. Binney, 1840)
Genus Stenotrema Rafinesque, 1819
Subgenus Toxotrema Rafinesque, 1819
Stenotrema (Toxotrema) barbatum (G. H. Clapp, 1904)
Tribe Vespericolini Emberton, 1995
Genus Micranepsia Pilsbry, 1940
Micranepsia germana (Gould in A. Binney, 1851)
Genus Vespericola Pilsbry, 1939
Vespericola columbianus (I. Lea, 1839)
Family Thysanophoridae Pilsbry, 1926
Genus Microphysula Cockerell in Pilsbry, 1926
Microphysula cookei (Pilsbry, 1922)
Microphysula ingersollii (Bland, 1875)
Family Xanthonychidae Strebel & Pfeffer, 1879
Subfamily Monadeniinae H. Nordsieck, 1987
Genus Monadenia Pilsbry, 1895
Subgenus Monadenia Pilsbry, 1895
Monadenia (Monadenia) fidelis (Gray, 1834)