Septa flaveola (P.F. Röding, 1798)
Sassia formosa (FOSSIL) (G.P. Deshayes, 1865 †)
Fusitriton galea J.T. Kuroda & T. Habe,1961
Ranularia gallinago (L.A. Reeve, 1844)
Sassia garrardi (A.G. Beu, 1970)
Monoplex gatunicus (FOSSIL) A.G. Beu, 2010 †
Monoplex gemmatus (L.A. Reeve, 1844)
Sassia gemmellari (FOSSIL) (Gregorio, 1880 †)
Ranella gemmifera F.M. Euthyme, 1889
Cymatiella gemmulatus (FOSSIL) (R. Tate, 1888 †)
Turritriton gibbosus (W.J. Broderip, 1833)
Turritriton gibbosus adairense W.H. Dall, 1910
Sassia gibbus (FOSSIL) R. Tate, 1888 †
Charonia gouetensis (FOSSIL) A.E.M. Cossmann, 1903 †
Lotoria grandimaculata (L.A. Reeve, 1844)
Cymatium grundense (FOSSIL) (R. Hoernes & M. Auinger,1884 †)
Charonia guichemerri (FOSSIL) P. Lozouet, 1998 †
Monoplex gurabonicus (FOSSIL) C.J. Maury, 1917 †
Ranularia gutturnia (P.F. Röding, 1798)
Gyrineum gyrineum (FOSSIL) (C. Linnaeus, 1758 †)
Gyrineum gyrinum (C. Linnaeus, 1758)
Septa hepatica (P.F. Röding, 1798)
Charonia heptagonum (FOSSIL) (G.B. Brocchi, 1815 †)
Gyrineum hirasei (J.T. Kuroda& T. Habe in T. Habe, 1961)
Gyrineum inaequicrenatus (FOSSIL) A.E.M. Cossmann& M.A. Peyrot, 1923 †
Sassia indica (FOSSIL) E.W. Vredenburg, 1925 †
Monoplex infelix (FOSSIL) C.J. Maury, 1924 †
Sassia inornata (FOSSIL) (G.P. Deshayes, 1865 †)
Ranella intercostalis (FOSSIL) R. Tate, 1888 †
Monoplex intermedius W.H. Pease, 1869
Monoplex jackwinorum (FOSSIL) A.G. Beu, 2010 †
Sassia jobbernsi (FOSSIL) (L. C. King, 1933 †)
Ranella kaiparaensis (FOSSIL) (Finlay, 1924 †)
Sassia kampyla Watson, 1885
Charonia kanabense (FOSSIL) Stanton, 1893 †