Pterides rhabdus H.A. Pilsbry, 1909
Somatogyrus rheophilus F.G. Thompson, 1984
Potamolithus ribeirensis H.A. Pilsbry, 1911
Manningiella rolfbrandti P. Temcharoen, 1971
Somatogyrus rosewateri W.J. Gordon, 1986
Lithoglyphus rumanus (FOSSIL) Stefanescu, 1896 †
Potamolithus rushii H.A. Pilsbry, 1896
Somatogyrus sargenti H.A. Pilsbry, 1895
Fluminicola scopulinus R. Hershler, H.P. Liu, T.J. Frest& E.J. Johannes, 2007
Fluminicola seminalis (R.B. Hinds, 1842)
Benedictia shadini J. Beckmann& Y.I. Starobogatov, 1975
Lepyrium showalteri (I. Lea, 1861)
Lithoglyphus sphaeridius (FOSSIL) V.V. Anistratenko& Gozhik, 1995 †
Somatogyrus strengi H.A. Pilsbry & B. Walker,1906
Lithoglyphus stricklandianus (FOSSIL) (E. Forbes, 1845 †)
Lithoglyphus subsphaeridius (FOSSIL) V.V. Anistratenko& Gozhik, 1995 †
Somatogyrus substriatus B. Walker, 1906
Potamolithus sykesi H.A. Pilsbry, 1896
Somatogyrus tenax F.G. Thompson, 1969
Somatogyrus tennesseensis B. Walker, 1906
Fluminicola tenuis H.A. Pilsbry
Shadinia terpoghassiani (V.I. Zhadin, 1952)
Potamolithus tietensis H.A. Pilsbry, 1925
Potamolithus tricostatus (A. Brot, 1867)
Potamolithus troglobius L.R.L. Simone& N. Moracchioli, 1994
Somatogyrus trothis H.L. Doherty, 1878
Somatogyrus tryoni H.A. Pilsbry & F.C. Baker,1927
Fluminicola turbiniformis G.W. Tryon, 1865
Clappia umbilicata (B. Walker, 1904)
Potamolithus valchetensis F.A.W. Miquel, 1998
Fluminicola virens (I. Lea, 1838)
Somatogyrus virginicus B. Walker, 1904
Fluminicola virginius R. Hershler, 1999
Somatogyrus walkerianus T.H. Aldrich, 1905
Somatogyrus walkeriarus W.J. Clench & H. Turner,1956