Triodopsis burchi L.R. Hubricht, 1950 USA. Virginia
Upsilodon burlesoni A. Metcalf& D.H. Riskind, 1978 Mexico, Saltillo
Stenotrema burringtoni F.W. Grimm, 1971 USA. Virginia
Stenotrema caddoensis (S. Archer, 1935)
Stenotrema calvescens L.R. Hubricht, 1961 Alabama, Madison County
Praticolella campi W.F. Clapp& J.H. Ferriss, 1919 Texas
Praticolella candida L.R. Hubricht, 1983 USA, Texas10,6 mm
Linisia cantralli G.A. Solem, 1957 Mexico, Jalisco
Ashmunella carlsbadensis H.A. Pilsbry, 1932 USA, New Mexico17,9 mm
Xolotrema caroliniense H.C. Lea, 1834 Tennessee, Marion County16 mm
Polygyra cereolus (J.K. Megerle Von Mühlfeld, 1816) Florida7 mm
Polygyra cereolus carpenteriana (T.B. Bland, 1860) Florida13 mm
Webbhelix chadwicki (J.H. Ferriss, 1907) Kansas
Stenotrema cheatumi (W. Fullington, 1974) United States
Polygyra chiapensis (L. Pfeiffer, 1856) Chiapas, Mexico
Appalachina chilhoweensis (J. Lewis, 1870) Tennessee35 mm
Ashmunella chiricahuana (W.H. Dall, 1896) Arizona, Cochise County
Daedalochila chisosensis H.A. Pilsbry, 1936 USA, Texas
Fumonelix christyi (T.B. Bland, 1860) South Carolina
Triodopsis claibornensis A. Lutz, 1950 Tennessee
Patera clarki H.C. Lea, 1858 Tennessee
Mesodon clausus T. Say, 1821 Missouri21 mm
Patera clenchi H.A. Rehder, 1932 Arkansas21,1 mm
Mesodon clingmanicus (H.A. Pilsbry, 1904)
Ashmunella cockerelli H.A. Pilsbry& J.H. Ferriss, 1917 New Mexico, Socorro County
Stenotrema cohuttense W.F. Clapp, 1914 USA, Georgia
Vespericola columbiana (J. Henderson, 1928) Washington11 mm
Triodopsis complanata (H.A. Pilsbry, 1898) Kentucky, Pulaski County
Triodopsis copei (A. Wetherby, 1878)
Giffordius corneliae H.A. Pilsbry, 1930 Nicaragua, Old Providence Island
Polygyra couloni (R.J. Shuttleworth, 1852) Veracruz, Mexico
Triodopsis cragini R.E. Call, 1886 Arkansas
Upsilodon dalli A. Metcalf& D.H. Riskind, 1978 Mexico, Saltillo
Ashmunella danielsi H.A. Pilsbry& J.H. Ferriss, 1915 New Mexico, Socorro County
Stenotrema deceptum W.F. Clapp, 1905 Tennessee8,1 mm