Platyceras gaspense (FOSSIL) A.H. Clarke, 1908 †
Platyostoma gebhardi (FOSSIL) (T.A. Conrad, 1840 †)
Rhineoderma gemmuliferum (FOSSIL) (B. Phillips, 1836 †)
Platyceras gibbosum (FOSSIL) J.W. Hall, 1859 †
Strophostylus girtyi (FOSSIL) (Knight, 1934 †)
Platyceras glenparkensis (FOSSIL) Weller, 1906 †
Strophostylus globosus (FOSSIL) J.W. Hall, 1859 †
Cyclonema gracile (FOSSIL) Ulrich & Scofield, 1897 †
Platyceras gracilis (FOSSIL) C.L.F. von Sandberger,1842 †
Turbonellina granulosa (FOSSIL) C. Gemmellaro, 1889 †
Platyostoma grayvillensis (FOSSIL) A.H. Worthen, 1882 †
Platyceras guesnini (FOSSIL) A.H. Clarke, 1908 †
Cyclonema guilleri (FOSSIL) Barrois, 1889 †
Cyclonema gyronemoides (FOSSIL) Foerste, 1923 †
Cyclonema hageri (FOSSIL) Billings, 1865 †
Platyceras hainensis (FOSSIL) Maurer, 1885 †
Platyceras haliotis (FOSSIL) (de Sowerby & Murchison,1839 †)
Platyceras haliotoides (FOSSIL) F.B. Meek & A.H. Worthen,1866 †
Cyclonema hallianum (FOSSIL) Salter, 1859 †
Platyceras hebes (FOSSIL) A.H. Clarke, 1907 †
Platyschisma helicoides (FOSSIL) (J. de C. Sowerby,1826 †)
Keeneia hesdoensis (FOSSIL) (Sahni & Dutt, 1959 †)
Cyclonema hiiumaa (FOSSIL) Teichert, 1928 †
Platyceras holzapfeli (FOSSIL) Spitz, 1907 †
Rhineoderma hotwellsensis (FOSSIL) Batten, 1966 †
Cyclonema humerosum (FOSSIL) Ulrich & Scofield, 1897 †
Platyostoma humile (FOSSIL) Billings, 1866 †
Platyostoma humilis (FOSSIL) A.H. Clarke & Swartz,1913 †
Platyceras humulus (FOSSIL) J. Perner, 1911 †
Cyclonema inaequistriatum (FOSSIL) E.F.R.K. Koken& J. Perner, 1925 †
Platyostoma incisum (FOSSIL) A.C. Chapman, 1916 †
Euthyrhachis indianense (FOSSIL) (Miller & Gurley, 1897 †)
Platyostoma indica (FOSSIL) L. Waagen, 1880 †
Platyschisma infima (FOSSIL) J. Perner, 1903 †
Cyclonema inflatum (FOSSIL) Ulrich & Scofield, 1897 †