| Anombrocheir bifurcata Buckett & Ga..., 1969 | |
| Anombrocheir spinosa Buckett & Ga..., 1969 | Whetstone talussnail |
| Appalachioria falcifera Keeton, 1959 | |
| Appalachioria turneri Keeton, 1959 | |
| Boraria carolina (Chamberlin, 1939) | ⇒ Boraria stricta Brölemann, 1896 |
| Boraria deturkiana Causey, 1942 | |
| Boraria geniculata Chamberlin, 1939 | |
| Boraria infesta Chamberlin, 1918 | Sierra shoulderband |
| Boraria media (Chamberlin, 1918) | ⇒ Boraria stricta Brölemann, 1896 |
| Boraria profuga (Causey, 1955) | ⇒ Cibularia profuga Causey, 1955 |
| Boraria stricta Brölemann, 1896 | |
| Caralinda beatrix Hoffman, 1978 | Milk snail |
| Caralinda causeyae Shelley, 1983 | Mimic talussnail |
| Caralinda causeyi (Shelley, 1983) | ⇒ Caralinda causeyae Shelley, 1983 |
| Caralinda dactylifera Shelley, 1983 | Mimic talussnail |
| Caralinda fabalecta Shelley, 2000 | |
| Caralinda pulchritecta Shelley, 1979 | Ramsey Canyon talussnail |
| Cherokia georgiana Chamberlin, 1939 | Antilles glass-slug |
| Cherokia georgiana ducilla Chamberlin, 1939 | |
| Cherokia georgiana georgiana Bollman, 1889 | |
| Cherokia georgiana latassa Hoffman, 1960 | |
| Cherokia latassa | |
| Cherokia parvior | |
| Chonaphe armata Harger, 1872 | Borrego desertsnail |
| Chonaphe cygneia (Chamberlin, 1949) | ⇒ Chonaphe armata Harger, 1872 |
| Chonaphe evexa Shelley, 1994 | |
| Chonaphe michigana (Chamberlin, 1946) | ⇒ Semionellus placidus Wood, 1864 |
| Chonaphe patriotica (Chamberlin, 1949) | ⇒ Chonaphe armata Harger, 1872 |
| Chonaphe remissa Chamberlin, 1949 | |
| Chonaphe schizoterminalis Shelley, 1994 | |
| Chonaphe serratus (Loomis & Sch..., 1971) | ⇒ Chonaphe armata Harger, 1872 |
| Devillea cerrutii Manfredi, 1956 | |
| Devillea doderoi Silvestri, 1903 | |
| Devillea doderoi doderoi Silvestri, 1903 | |
| Devillea doderoi sanctijohannis Strasser, 1974 | |
| Devillea patrizii Manfredi, 1956 | |
| Devillea subterranea Verhoeff, 1943 | |
| Devillea tuberculata Brölemann, 1902 | |
| Dicellarius atlanta Chamberlin, 1946 | Rincon talussnail |
| Dicellarius bimaculatus McNeill, 1887 | Budded threetooth |
| Dicellarius bimaculatus bimaculatus McNeill, 1887 | |
| Dicellarius bimaculatus fictus Chamberlin, 1943 | |
| Dicellarius bimaculatus lamellidens Chamberlin, 1931 | |
| Dicellarius okefenokensis Chamberlin, 1918 | Sierra shoulderband |
| Dicellarius sternobolus | |
| Dicellarius sternolobus Loomis, 1969 | Pungent talussnail |
| Dicellarius talapoosa Chamberlin, 1939 | Seagrass elysia |
| Dicellarius talapoosa separandus Shelley, 1984 | |
| Dicellarius talapoosa talapoosa Chamberlin, 1939 | |
| Erdelyia saucra Hoffman, 1963 | |
| Gonoessa aciculata Shelley, 1984 | |
| Gonoessa cingulata Shelley, 1984 | |
| Gonoessa clavata Shelley, 1984 | |
| Gonoessa dentata Shelley, 1984 | |
| Gonoessa furcata Shelley, 1984 | |
| Gyalostethus monticolens (Chamberlin, 1951) | ⇒ Boraria monticolens Chamberlin, 1951 |
| Harpaphe clara (Chamberlin, 1949) | ⇒ Harpaphe haydeniana scotia Chamberlin, 1941 |
| Harpaphe haydeniana Wood, 1864 | Almond-scented millipede |
| Harpaphe haydeniana cummingsiensis Verhoeff, 1944 | |
| Harpaphe haydeniana haydeniana Wood, 1864 | |
| Harpaphe haydeniana inlignea Chamberlin, 1949 | |
| Harpaphe haydeniana lanceolata Buckett & Ga..., 1968 | |
| Harpaphe haydeniana maurogona Buckett & Ga..., 1968 | |
| Harpaphe haydeniana scotia Chamberlin, 1941 | |
| Harpaphe haydenianus Wood, 1864 | |
| Harpaphe inlignea (Chamberlin, 1949) | ⇒ Harpaphe haydeniana inlignea Chamberlin, 1949 |
| Harpaphe penulta (Chamberlin, 1949) | ⇒ Harpaphe haydeniana haydeniana Wood, 1864 |
| Harpaphe pottera Chamberlin, 1949 | |
| Harpaphe telodonta (Chamberlin, 1943) | ⇒ Paimokia telodonta Chamberlin, 1943 |
| Isaphe convexa Cook, 1904 | Rocky mountainsnail |
| Isaphe tersa Cook, 1904 | Keeled mountainsnail |
| Kiulinga jeekeli Hoffman, 1956 | |
| Koreoaria amoea | |
| Koreoaria pallida Verhoeff, 1937 | |
| Levizonus takakuwai Verhoeff, 1941 | |
| Levizonus thaumasius Attems, 1898 | |
| Lourdesia minuscula Shelley, 1991 | |
| Metaxycheir pacifica Shelley, 1990 | |
| Metaxycheir prolata Buckett & Ga..., 1969 | Whetstone talussnail |
| Montaphe elrodi Chamberlin, 1913 | |
| Montaphe paraphoena Shelley, 1994 | |
| Motyxia bistipita Shelley, 1996 | |
| Motyxia exilis (Loomis, 1953) | ⇒ Motyxia monica Chamberlin, 1944 |
| Motyxia expansa (Loomis, 1953) | ⇒ Motyxia monica Chamberlin, 1944 |
| Motyxia exspansa | |
| Motyxia kerna Chamberlin, 1941 | Deep Slide mountainsnail |
| Motyxia monica Chamberlin, 1944 | |
| Motyxia pior Chamberlin, 1941 | Deep Slide mountainsnail |
| Motyxia porrecta Causey & Tie..., 1969 | |
| Motyxia sequoia Causey & Tie..., 1969 | Surf shoulderband |
| Motyxia sequoia alia Causey & Tie..., 1969 | |
| Motyxia sequoia sequoia Chamberlin, 1941 | |
| Motyxia sequoiae Loomis & Dav..., 1951 | |
| Motyxia tiemanni Causey & Tie..., 1969 | |
| Motyxia tularea Chamberlin, 1949 | Thin-ribbed mountainsnail |
| Motyxia tularea ollae Causey & Tie..., 1969 | |
| Motyxia tularea tularea Chamberlin, 1949 | |
| Nannaria austricola Hoffman, 1950 | Shasta chaparral |
| Nannaria castanea McNeill, 1887 | Spring mountainsnail |
| Nannaria cayugae Chamberlin, 1949 | |
| Nannaria conservata Chamberlin, 1940 | Cape Fear threetooth |
| Nannaria davidcauseyi Causey, 1950 | |
| Nannaria depalmai Causey, 1950 | |
| Nannaria domestica Shelley, 1975 | |
| Nannaria equalis Chamberlin, 1949 | |
| Nannaria ericacea Hoffman, 1949 | Papillose elysia |
| Nannaria fowleri Chamberlin, 1947 | Kyle Canyon mountainsnail |
| Nannaria infesta (Chamberlin, 1918) | ⇒ Boraria infesta Chamberlin, 1918 |
| Nannaria laminata Hoffman, 1949 | Papillose elysia |
| Nannaria media (Chamberlin, 1918) | ⇒ Boraria stricta Brölemann, 1896 |
| Nannaria minor Chamberlin, 1918 | Redwood hesperian |
| Nannaria missouriensis Chamberlin, 1928 | |
| Nannaria morrisoni Hoffman, 1948 | Ornate elysia |
| Nannaria oblonga C.L. Koch, 1847 | |
| Nannaria ohionis Loomis & Hof..., 1948 | |
| Nannaria pygmaea | |
| Nannaria rutherfordensis Shelley, 1975 | |
| Nannaria schenandoah | |
| Nannaria scutellaria Causey, 1942 | |
| Nannaria shenandoa Hoffman, 1949 | |
| Nannaria shenandoah Hoffman, 1949 | Papillose elysia |
| Nannaria simplex Hoffman, 1949 | Papillose elysia |
| Nannaria tennesseensis Bollman, 1889 | |
| Nannaria terricola Williams & H..., 1928 | |
| Nannaria ursa (Chamberlin, 1938) | ⇒ Stenodesmus tuobitus Chamberlin, 1910 |
| Nannaria wilsoni Hoffman, 1949 | Papillose elysia |
| Ochthocelata adynata Shelley, 1995 | |
| Oenomaea pulchella (Bollman, 1889) | ⇒ Fontaria pulchella Bollman, 1889 |
| Orophe cabinetus Chamberlin, 1951 | Anza shoulderband |
| Orophe unicus Loomis, 1953 | |
| Pachydesmus attemsi Wang, 1960 | |
| Pachydesmus bazanensis Takakuwa, 1942 | |
| Pachydesmus clarus Chamberlin, 1918 | Sierra shoulderband |
| Pachydesmus crassicutis Hoffman, 1958 | Elegant helicellid |
| Pachydesmus crassicutis adsinicolus Hoffman, 1958 | |
| Pachydesmus crassicutis crassicutis Wood, 1864 | |
| Pachydesmus crassicutis denticulatus Chamberlin, 1946 | |
| Pachydesmus crassicutis duplex Chamberlin, 1939 | |
| Pachydesmus crassicutis hubrichti Hoffman, 1958 | |
| Pachydesmus crassicutis incursus Chamberlin, 1939 | |
| Pachydesmus crassicutis laticollis Attems, 1899 | |
| Pachydesmus crassicutis retrorsus Chamberlin, 1921 | |
| Pachydesmus cummingsiensis (Verhoeff, 1944) | ⇒ Harpaphe haydeniana cummingsiensis Verhoeff, 1944 |
| Pachydesmus denticulatus (Chamberlin, 1946) | ⇒ Pachydesmus crassicutis denticulatus Chamberlin, 1946 |
| Pachydesmus duplex (Chamberlin, 1939) | ⇒ Pachydesmus crassicutis duplex Chamberlin, 1939 |
| Pachydesmus incursus (Chamberlin, 1939) | ⇒ Pachydesmus crassicutis incursus Chamberlin, 1939 |
| Pachydesmus kisatchinsis (Chamberlin, 1942) | ⇒ Pachydesmus clarus Chamberlin, 1918 |
| Pachydesmus retrorsus (Chamberlin, 1921) | ⇒ Pachydesmus crassicutis retrorsus Chamberlin, 1921 |
| Pachydesmus simulans (Chamberlin, 1942) | ⇒ Pachydesmus crassicutis crassicutis Wood, 1864 |
| Parcipromus cooki Causey, 1955 | |
| Parcipromus gigantoarboricolus Shelley, 1995 | |
| Parcipromus tiemanni Shelley, 1995 | |
| Parvulodesmus prolixogonus Shelley, 1983 | Mimic talussnail |
| Parvulodesmus stephani Shelley, 2001 | |
| Pleuroloma cala Chamberlin, 1939 | Seagrass elysia |
| Pleuroloma flavipes Rafinesque, 1820 | Barren milkvetch |
| Pleuroloma pinicola Shelley, 1980 | Blue-spot oxynoe |
| Pleuroloma plana Shelley, 1980 | Blue-spot oxynoe |
| Rhysodesmus acolhuus Humbert & Sa..., 1869 | Golden zachrysia |
| Rhysodesmus agrestis Shelley, 1999 | |
| Rhysodesmus agrestris | |
| Rhysodesmus alpuyecus Chamberlin, 1943 | Costate mountainsnail |
| Rhysodesmus amplinus (Chamberlin, 1952) | ⇒ Rhysodesmus toltecus Saussure, 1859 |
| Rhysodesmus angelus Karsch, 1881 | |
| Rhysodesmus angustus Loomis, 1966 | Hacheta mountainsnail |
| Rhysodesmus arcuatus Pocock, 1910 | Harlequin glass-slug |
| Rhysodesmus attemsi Pocock, 1909 | Boulder slide threeband |
| Rhysodesmus bolivari Chamberlin, 1943 | Costate mountainsnail |
| Rhysodesmus bonus Chamberlin, 1943 | |
| Rhysodesmus brachus (Chamberlin, 1941) | ⇒ Rhysodesmus texicolens Chamberlin, 1938 |
| Rhysodesmus byersi Loomis, 1966 | Hacheta mountainsnail |
| Rhysodesmus championi Pocock, 1909 | Boulder slide threeband |
| Rhysodesmus chisosi Shelley, 1989 | Sonoran talussnail |
| Rhysodesmus cohaesiva Wang, 1957 | |
| Rhysodesmus cohaesivus Wang, 1957 | |
| Rhysodesmus consobrinus Saussure, 1859 | Pygmy mountainsnail |
| Rhysodesmus constrictor | |
| Rhysodesmus constrictus Loomis, 1966 | Hacheta mountainsnail |
| Rhysodesmus contiguus Wang, 1957 | |
| Rhysodesmus coriaceus Loomis, 1968 | Boulder Pile mountainsnail |
| Rhysodesmus cuernavacae Chamberlin, 1942 | Coalinga shoulderband |
| Rhysodesmus cumbres Chamberlin, 1943 | Costate mountainsnail |
| Rhysodesmus dampfi Verhoeff, 1932 | |
| Rhysodesmus dasypus Gervais, 1847 | |
| Rhysodesmus depressus Loomis, 1966 | Hacheta mountainsnail |
| Rhysodesmus elestribus Chamberlin, 1943 | Costate mountainsnail |
| Rhysodesmus esperanzae Chamberlin, 1943 | Costate mountainsnail |
| Rhysodesmus eunis Chamberlin, 1943 | Costate mountainsnail |
| Rhysodesmus eusculptus Chamberlin, 1941 | Deep Slide mountainsnail |
| Rhysodesmus eutypus (Chamberlin, 1943) | ⇒ Rhysodesmus dampfi Verhoeff, 1932 |
| Rhysodesmus flavocinctus Pocock, 1909 | Boulder slide threeband |
| Rhysodesmus fraternus Saussure, 1859 | Pygmy mountainsnail |
| Rhysodesmus frionus Chamberlin, 1943 | Costate mountainsnail |
| Rhysodesmus garcianus Chamberlin, 1943 | Costate mountainsnail |
| Rhysodesmus godmani Pocock, 1909 | Boulder slide threeband |
| Rhysodesmus guardanus Chamberlin, 1943 | Costate mountainsnail |
| Rhysodesmus hamatilis Loomis, 1966 | Hacheta mountainsnail |
| Rhysodesmus intermedius Chamberlin, 1943 | Costate mountainsnail |
| Rhysodesmus inustus Pocock, 1910 | Harlequin glass-slug |
| Rhysodesmus jugosus Loomis, 1966 | Hacheta mountainsnail |
| Rhysodesmus knighti Chamberlin, 1941 | Deep Slide mountainsnail |
| Rhysodesmus latus Loomis, 1968 | Boulder Pile mountainsnail |
| Rhysodesmus leonensis Chamberlin, 1941 | Deep Slide mountainsnail |
| Rhysodesmus limax (Saussure, 1859) | ⇒ Rhysodesmus dasypus Gervais, 1847 |
| Rhysodesmus malinche Chamberlin, 1943 | Costate mountainsnail |
| Rhysodesmus marcosus Chamberlin, 1952 | Keys mudcloak |
| Rhysodesmus mayanus Chamberlin, 1925 | |
| Rhysodesmus minor Chamberlin, 1943 | Budded threetooth |
| Rhysodesmus montezumae Saussure, 1859 | Pygmy mountainsnail |
| Rhysodesmus morelus Chamberlin, 1943 | Costate mountainsnail |
| Rhysodesmus murallensis Loomis, 1966 | Hacheta mountainsnail |
| Rhysodesmus mystecus Humbert & Sa..., 1869 | Golden zachrysia |
| Rhysodesmus nahuus Humbert & Sa..., 1869 | Golden zachrysia |
| Rhysodesmus notostictus Pocock, 1910 | Harlequin glass-slug |
| Rhysodesmus oaxacanus | |
| Rhysodesmus obliquus Loomis, 1966 | Hacheta mountainsnail |
| Rhysodesmus otomitus Saussure, 1859 | Pygmy mountainsnail |
| Rhysodesmus pater (Chamberlin, 1943) | ⇒ Rhysodesmus tepanecus Saussure, 1859 |
| Rhysodesmus perotenus Chamberlin, 1943 | Costate mountainsnail |
| Rhysodesmus perotinus | |
| Rhysodesmus potosianus Chamberlin, 1942 | Coalinga shoulderband |
| Rhysodesmus punctatus Loomis, 1966 | Hacheta mountainsnail |
| Rhysodesmus pusillus Pocock, 1909 | Boulder slide threeband |
| Rhysodesmus quadruplus (Loomis, 1966) | ⇒ Rhysodesmus texicolens Chamberlin, 1938 |
| Rhysodesmus restans Hoffman, 1998 | Mimic shoulderband |
| Rhysodesmus rubrimarginis Chamberlin, 1943 | Costate mountainsnail |
| Rhysodesmus sandersi Causey, 1954 | Sonoma shoulderband |
| Rhysodesmus semicircularis Takakuwa, 1941 | |
| Rhysodesmus semiovatus Loomis, 1966 | Hacheta mountainsnail |
| Rhysodesmus seriatus Chamberlin, 1947 | Kyle Canyon mountainsnail |
| Rhysodesmus simplex Loomis, 1966 | Hacheta mountainsnail |
| Rhysodesmus smithi Pocock, 1910 | Harlequin glass-slug |
| Rhysodesmus stolli Pocock, 1909 | Boulder slide threeband |
| Rhysodesmus tabascensis Pocock, 1909 | Boulder slide threeband |
| Rhysodesmus tacubayae Pocock, 1909 | Costate mountainsnail |
| Rhysodesmus tepanecus Saussure, 1859 | Pygmy mountainsnail |
| Rhysodesmus tepoztlanus Chamberlin, 1943 | Costate mountainsnail |
| Rhysodesmus texicolens Chamberlin, 1938 | San Lorenzo shoulderband |
| Rhysodesmus toltecus Saussure, 1859 | Pygmy mountainsnail |
| Rhysodesmus totonacus Saussure, 1859 | Pygmy mountainsnail |
| Rhysodesmus viabilis (Chamberlin, 1943) | ⇒ Rhysodesmus texicolens Chamberlin, 1938 |
| Rhysodesmus vicinus Saussure, 1859 | Pygmy mountainsnail |
| Rhysodesmus violaceus Brölemann, 1900 | Sidewinder shoulderband |
| Rhysodesmus zapotecus Saussure, 1860 | Fringed mountainsnail |
| Rhysodesmus zendalus Humbert & Sa..., 1869 | Golden zachrysia |
| Riukiaria anachoreta Tanabe, 1988 | |
| Riukiaria cornuta Haga, 1968 | |
| Riukiaria falcifera Verhoeff, 1936 | |
| Riukiaria hoffmani Jeekel, 1952 | |
| Riukiaria holstii Pocock, 1895 | |
| Riukiaria martensi Golovatch, 2014 | |
| Riukiaria ochracea Gressitt, 1941 | |
| Riukiaria puella Tanabe, 1988 | |
| Riukiaria pugionifera Verhoeff, 1936 | |
| Riukiaria taiwana Takakuwa, 1942 | |
| Riukiaria uraensis Wang, 1956 | |
| Selenocheir arcuata Shelley, 1994 | |
| Selenocheir directa Shelley, 1994 | |
| Selenocheir sinuata Shelley, 1994 | |
| Semionellus placidus Wood, 1864 | Grand Coulee mountainsnail |
| Sigmocheir calaveras Chamberlin, 1951 | Anza shoulderband |
| Sigmocheir furcata Shelley, 1995 | |
| Sigmocheir maculifer Chamberlin, 1941 | Surf shoulderband |
| Stenodesmus acuarius Attems, 1931 | |
| Stenodesmus exile | |
| Stenodesmus mexicanus Saussure, 1859 | |
| Stenodesmus simillimus Humbert & Sa..., 1869 | Golden zachrysia |
| Stenodesmus tuobitus Chamberlin, 1910 | Joshua Tree desertsnail |
| Thrinaphe hargeri Shelley, 1993 | |
| Thrinaxoria bifida Wood, 1864 | Grand Coulee mountainsnail |
| Thrinaxoria lampra Chamberlin, 1918 | Sierra shoulderband |
| Thrinaxoria paynei Shelley, 2002 | |
| Tubaphe levii Causey, 1954 | Sonoma shoulderband |
| Wamokia dentata Buckett & Ga..., 1968 | |
| Wamokia discordis Buckett & Ga..., 1968 | |
| Wamokia falcata Buckett & Ga..., 1968 | |
| Wamokia hoffmani Buckett & Ga..., 1968 | |
| Wamokia placera (Chamberlin, 1941) | ⇒ Wamokia placerna Chamberlin, 1941 |
| Wamokia placerna Chamberlin, 1941 | |
| Wamokia remota Buckett & Ga..., 1968 | |
| Wamokia sierrae Buckett & Ga..., 1968 | |
| Xystocheir bistipita Shelley, 1996 | |
| Xystocheir brachymacris Shelley, 1996 | |
| Xystocheir dissecta Wood, 1867 | Hairy helicellid |
| Xystocheir dissecta dissecta Wood, 1867 | |
| Xystocheir dissecta microrama Shelley, 1996 | |
| Xystocheir dissecta taibona Chamberlin, 1912 | |
| Xystocheir francisca (Chamberlin, 1949) | ⇒ Xystocheir dissecta dissecta Wood, 1867 |
| Xystocheir milpetas Chamberlin, 1949 | |
| Xystocheir milpitas (Chamberlin, 1949) | ⇒ Xystocheir dissecta dissecta Wood, 1867 |
| Xystocheir modestior Shelley, 1996 | Surf shoulderband |
| Xystocheir modestior haerens Shelley, 1996 | |
| Xystocheir modestior modestior Chamberlin, 1941 | |
| Xystocheir prolixorama Shelley, 1996 | |
| Xystocheir reducta Causey, 1955 | |
| Xystocheir sequoia (Chamberlin, 1941) | ⇒ Motyxia sequoia sequoia Chamberlin, 1941 |
| Xystocheir solenofurcata Shelley, 1996 | |
| Xystocheir stenomacris Shelley, 1996 | |
| Xystocheir stolonifera Shelley, 1996 | |
| Xystocheir stolonifera stolonifera Shelley, 1996 | |
| Xystocheir stolonifera uncinata Shelley, 1996 | |
| Xystocheir tularares | |
| Xystocheir tularea (Chamberlin, 1949) | ⇒ Motyxia tularea tularea Chamberlin, 1949 |
| Xystodesmus martensii Peters, 1864 | |
| Yaetakaria youngi Hoffman, 1949 | |
