Pterides rhabdus H.A. Pilsbry, 1909 Mexico, San Luis Potosì
Somatogyrus rheophilus F.G. Thompson, 1984 USA, Georgia
Potamolithus ribeirensis H.A. Pilsbry, 1911 Brazil, Rio Grande do Sul4,8 mm
Manningiella rolfbrandti P. Temcharoen, 1971 Laos4,2 mm
Somatogyrus rosewateri W.J. Gordon, 1986 Missouri
Lithoglyphus rumanus (FOSSIL) Stefanescu, 1896 †
Potamolithus rushii H.A. Pilsbry, 1896 Uruguay
Somatogyrus sargenti H.A. Pilsbry, 1895 Alabama
Fluminicola scopulinus R. Hershler, H.P. Liu, T.J. Frest& E.J. Johannes, 2007 Oregon
Fluminicola seminalis (R.B. Hinds, 1842) Oregon5,6 mm
Benedictia shadini J. Beckmann& Y.I. Starobogatov, 1975
Lepyrium showalteri (I. Lea, 1861) Alabama
Lithoglyphus sphaeridius (FOSSIL) V.V. Anistratenko& Gozhik, 1995 †
Somatogyrus strengi H.A. Pilsbry & B. Walker,1906 Alabama
Lithoglyphus stricklandianus (FOSSIL) (E. Forbes, 1845 †)
Lithoglyphus subsphaeridius (FOSSIL) V.V. Anistratenko& Gozhik, 1995 †
Somatogyrus substriatus B. Walker, 1906 Alabama
Potamolithus sykesi H.A. Pilsbry, 1896 Uruguay
Somatogyrus tenax F.G. Thompson, 1969 USA, Georgia
Somatogyrus tennesseensis B. Walker, 1906 Tennessee
Fluminicola tenuis H.A. Pilsbry
Shadinia terpoghassiani (V.I. Zhadin, 1952)
Potamolithus tietensis H.A. Pilsbry, 1925 Brazil, Sao Paulo
Potamolithus tricostatus (A. Brot, 1867) Uruguay6,3 mm
Potamolithus troglobius L.R.L. Simone& N. Moracchioli, 1994 Brazil, Sao Paulo
Somatogyrus trothis H.L. Doherty, 1878 USA, Kentucky
Somatogyrus tryoni H.A. Pilsbry& F.C. Baker, 1927 Wisconsin
Fluminicola turbiniformis G.W. Tryon, 1865 Nevada
Clappia umbilicata (B. Walker, 1904) Tennessee
Potamolithus valchetensis F.A.W. Miquel, 1998
Fluminicola virens (I. Lea, 1838) Oregon, Clackamas County
Somatogyrus virginicus B. Walker, 1904 USA. Virginia
Fluminicola virginius R. Hershler, 1999 Nevada, Washoe County
Somatogyrus walkerianus T.H. Aldrich, 1905 Alabama
Somatogyrus walkeriarus W.J. Clench & H. Turner,1956