| Causeyella dendropus Loomis, 1939 | |
| Cleidogona accretis Shear, 1972 | Table Top talussnail |
| Cleidogona alata Causey, 1961 | Mustang talussnail |
| Cleidogona arkansana Causey, 1954 | Sonoma shoulderband |
| Cleidogona atropos Shear, 1972 | Table Top talussnail |
| Cleidogona australis Loomis, 1966 | Hacheta mountainsnail |
| Cleidogona bacillipus Chamberlin &..., 1941 | |
| Cleidogona caesioannulata Wood, 1865 | Animas talussnail |
| Cleidogona caroliniana Causey, 1957 | Lava rock mountainsnail |
| Cleidogona celerita Williams & H..., 1928 | Portal talussnail |
| Cleidogona chisosi Loomis, 1963 | |
| Cleidogona cyclipes Loomis, 1969 | Pungent talussnail |
| Cleidogona exaspera (Williams & H..., 1928) | ⇒ Cleidogona caesioannulata Wood, 1865 |
| Cleidogona fidelitor Shear, 1972 | Table Top talussnail |
| Cleidogona forceps Cook & Collins, 1895 | Big Emigrant talussnail |
| Cleidogona fustis Cook & Collins, 1895 | Big Emigrant talussnail |
| Cleidogona georgia Shear, 1972 | Table Top talussnail |
| Cleidogona grenada Shear, 1972 | Table Top talussnail |
| Cleidogona hadena Causey, 1961 | Mustang talussnail |
| Cleidogona hoffmani Shear, 1972 | Table Top talussnail |
| Cleidogona inexpectata Hoffman, 1950 | Shasta chaparral |
| Cleidogona jocassee Hoffman, 1950 | Shasta chaparral |
| Cleidogona lachesis Shear, 1982 | Table Top talussnail |
| Cleidogona laminata Cook & Collins, 1895 | Big Emigrant talussnail |
| Cleidogona major Cook & Collins, 1895 | Big Emigrant talussnail |
| Cleidogona margarita Hoffman, 1950 | Shasta chaparral |
| Cleidogona medialis Shelley, 1976 | Little talussnail |
| Cleidogona minima Causey, 1951 | Posta Quemada talussnail |
| Cleidogona mississippiana Chamberlin, 1942 | Coalinga shoulderband |
| Cleidogona nantahala Shear, 1972 | Table Top talussnail |
| Cleidogona saripa Causey, 1961 | Mustang talussnail |
| Cleidogona sayana Bollman, 1893 | Foothill shoulderband |
| Cleidogona steno Shear, 1972 | Table Top talussnail |
| Cleidogona sublettei Causey, 1954 | Sonoma shoulderband |
| Cleidogona tallapoosa Shear, 1972 | Table Top talussnail |
| Cleidogona unita Causey, 1951 | Posta Quemada talussnail |
| Cleidogona varicornis Loomis, 1959 | |
| Cleidogona wrayi Causey, 1957 | Lava rock mountainsnail |
| Cryptotrichus caesioannulatus (Wood, 1865) | ⇒ Cleidogona caesioannulata Wood, 1865 |
| Dearolfia lusciosa (Loomis, 1939) | ⇒ Pseudotremia lusciosa Loomis, 1939 |
| Flagellopetalum quadratum (Loomis, 1966) | ⇒ Trichopetalum quadratum Loomis, 1966 |
| Mecistopus varicornis (Loomis, 1959) | ⇒ Cleidogona bacillipus Chamberlin &..., 1941 |
| Mexiterpes egeo Causey, 1969 | Evening talussnail |
| Ozarkogona ladymani (Causey, 1952) | ⇒ Tiganogona ladymani Causey, 1952 |
| Pseudotremia acheron Shear, 1972 | Table Top talussnail |
| Pseudotremia aeacus Shear, 1972 | Table Top talussnail |
| Pseudotremia alecto Shear, 1972 | Table Top talussnail |
| Pseudotremia amphiorax Shear, 1972 | Table Top talussnail |
| Pseudotremia armesi Shear, 1972 | Table Top talussnail |
| Pseudotremia blacki Lewis, 2000 | |
| Pseudotremia burnsorum Lewis, 2000 | |
| Pseudotremia callae Lewis, 2009 | Call's cave millipede |
| Pseudotremia carterensis Packard, 1883 | White avens |
| Pseudotremia cavernarum (Cope, 1869) | ⇒ Pseudotremia carterensis Packard, 1883 |
| Pseudotremia cavernarum carterensis (Packard, 1883) | ⇒ Pseudotremia carterensis Packard, 1883 |
| Pseudotremia cercops Shear, 1972 | Table Top talussnail |
| Pseudotremia cocytus Shear, 1972 | Table Top talussnail |
| Pseudotremia conservata Hoffman & Lewis, 1997 | Rosemont talussnail |
| Pseudotremia contorta | |
| Pseudotremia cookorum Lewis, 2000 | |
| Pseudotremia cottus (Shear, 1972) | ⇒ Pseudotremia fracta fracta Chamberlin, 1951 |
| Pseudotremia culveri | |
| Pseudotremia deprehendor Shear, 1972 | Table Top talussnail |
| Pseudotremia douglasi Lewis, 2009 | Douglas' cave millipede |
| Pseudotremia eburnea Loomis, 1939 | Santa Catalina talussnail |
| Pseudotremia fracta Hoffman, 1981 | Agua Caliente talussnail |
| Pseudotremia fracta fracta Chamberlin, 1951 | |
| Pseudotremia fremens | |
| Pseudotremia fulgida Loomis, 1943 | Tehama chaparral |
| Pseudotremia garlandae Lewis, 2005 | |
| Pseudotremia hansoni Chamberlin, 1951 | Anza shoulderband |
| Pseudotremia hobbsi Hoffman, 1950 | Shasta chaparral |
| Pseudotremia hoffmani Lewis, 2009 | Hoffman's cave millipede |
| Pseudotremia hubbardi | |
| Pseudotremia indianae Hoffman, 1958 | Lowe Canyon shoulderband |
| Pseudotremia johnholsingeri | |
| Pseudotremia laudermilki Lewis, 2009 | Laudermilk's cave millipede |
| Pseudotremia lethe Shear, 1972 | Table Top talussnail |
| Pseudotremia lictor Shear, 1972 | Table Top talussnail |
| Pseudotremia lusciosa Loomis, 1939 | Picacho talussnail |
| Pseudotremia manni Lewis, 2005 | |
| Pseudotremia merops Shear, 1972 | Table Top talussnail |
| Pseudotremia minos Shear, 1972 | Table Top talussnail |
| Pseudotremia momus Shear, 1972 | Table Top talussnail |
| Pseudotremia nefanda Shear, 1972 | Table Top talussnail |
| Pseudotremia nodosa Loomis, 1939 | Santa Catalina talussnail |
| Pseudotremia nyx Shear, 1972 | Table Top talussnail |
| Pseudotremia princeps Loomis, 1939 | Santa Catalina talussnail |
| Pseudotremia purselli Lewis, 2000 | |
| Pseudotremia reynoldsae Lewis, 2003 | |
| Pseudotremia rhadamanthus Shear, 1972 | Table Top talussnail |
| Pseudotremia roebuckorum Lewis, 2005 | |
| Pseudotremia ryensis | |
| Pseudotremia salisae Lewis, 2000 | |
| Pseudotremia scrutorum Shear, 1972 | Table Top talussnail |
| Pseudotremia sheari Lewis, 2009 | Shear's cave millipede |
| Pseudotremia shelleyi Lewis, 2009 | Shelley's cave millipede |
| Pseudotremia simulans Loomis, 1939 | Santa Catalina talussnail |
| Pseudotremia soco Shear, 1972 | Table Top talussnail |
| Pseudotremia sodalis (Loomis, 1939) | ⇒ Pseudotremia carterensis Packard, 1883 |
| Pseudotremia spira Shear, 1972 | Table Top talussnail |
| Pseudotremia stupefactor Shear, 1972 | Table Top talussnail |
| Pseudotremia styx Lewis, 2009 | Sinking Valley cave millipede |
| Pseudotremia sublevis Loomis, 1944 | Las Guijas talussnail |
| Pseudotremia tsuga Shear, 1972 | Table Top talussnail |
| Pseudotremia tuberculata Loomis, 1939 | Santa Catalina talussnail |
| Pseudotremia unca Shear, 1972 | Table Top talussnail |
| Pseudotremia valga Loomis, 1943 | Tehama chaparral |
| Pseudotremia wallaceae Lewis, 2005 | |
| Pseudotremia withersi Lewis, 2009 | Withers' cave millipede |
| Scoterpes austrinus Loomis, 1943 | Tehama chaparral |
| Scoterpes copei Packard, 1881 | |
| Scoterpes dendropus Loomis, 1939 | Santa Catalina talussnail |
| Scoterpes sollmani Lewis, 2000 | |
| Scoterpes ventus Shear, 1972 | Table Top talussnail |
| Scoterpes wyandotte | |
| Scotherpes wyandotte (Bollman, 1889) | ⇒ Conotyla bollmani McNeill, 1887 |
| Spirostrephon creolum (Chamberlin, 1942) | ⇒ Abacion tesselatum Rafinesque, 1820 |
| Spirostrephon highlandensis (Hoffman, 1950) | ⇒ Abacion magnum Loomis, 1943 |
| Spirostrephon jonesi (Chamberlin, 1942) | ⇒ Abacion texensis Loomis, 1937 |
| Spirostrephon lactarium (Say, 1821) | ⇒ Abacion lactarium Say, 1821 |
| Spirostrephon magnum (Loomis, 1943) | ⇒ Abacion magnum Loomis, 1943 |
| Spirostrephon texensis (Loomis, 1937) | ⇒ Abacion texensis Loomis, 1937 |
| Spirostrephon utorum (Chamberlin, 1925) | ⇒ Colactis utorum Chamberlin, 1925 |
| Tiganogona alia Causey, 1951 | Pinaleno mountainsnail |
| Tiganogona brownae Chamberlin, 1928 | |
| Tiganogona conifer Cook & Collins, 1895 | Superstition Mountain talussnail |
| Tiganogona glebosa Causey, 1951 | Pinaleno mountainsnail |
| Tiganogona ladymani Causey, 1952 | Dona Ana talussnail |
| Tiganogona levis Causey, 1959 | Tortolita talussnail |
| Tiganogona moesta Causey, 1951 | Pinaleno mountainsnail |
| Tiganogona steuartae Causey, 1951 | Pinaleno mountainsnail |
| Trichopetalum album (Cook & Collins, 1895) | ⇒ Trichopetalum lunatum Harger, 1872 |
| Trichopetalum appropinquo Causey, 1969 | Evening talussnail |
| Trichopetalum cornutum Cook & Collins, 1895 | Big Emigrant talussnail |
| Trichopetalum dux Chamberlin, 1940 | Pallid mountainsnail |
| Trichopetalum flavidum Bollman, 1888 | |
| Trichopetalum krekeleri Causey, 1960 | Santa Rita talussnail |
| Trichopetalum lunatum Harger, 1872 | Chiricahua talussnail |
| Trichopetalum montis Chamberlin, 1951 | Anza shoulderband |
| Trichopetalum packardi Causey, 1960 | Santa Rita talussnail |
| Trichopetalum quadratum Loomis, 1966 | White desertsnail |
| Trichopetalum stannardi Causey, 1951 | Pinaleno mountainsnail |
| Trichopetalum subterraneum Causey, 1967 | |
| Trichopetalum syntheticum Shear, 1972 | Table Top talussnail |
| Trichopetalum uncum Cook & Collins, 1895 | Big Emigrant talussnail |
| Trichopetalum weyeriensis Causey, 1960 | Santa Rita talussnail |
| Trichopetalum whitei Ryder, 1881 | Doubtful Canyon talussnail |
| Trigenotyla parca Causey, 1951 | Posta Quemada talussnail |
| Tynopus dux (Chamberlin, 1940) | ⇒ Trichopetalum dux Chamberlin, 1940 |
| Zygonopus krekeleri (Causey, 1960) | ⇒ Trichopetalum krekeleri Causey, 1960 |
| Zygonopus packardi (Causey, 1960) | ⇒ Trichopetalum packardi Causey, 1960 |
| Zygonopus weyeriensis (Causey, 1960) | ⇒ Trichopetalum weyeriensis Causey, 1960 |
| Zygonopus whitei (Ryder, 1881) | ⇒ Trichopetalum whitei Ryder, 1881 |
