Tubomphalus inflatus (FOSSIL) J. Perner, 1907 †
Cyclonema infrequens (FOSSIL) J. Perner, 1907 †
Cyclonema inopinata (FOSSIL) J. Perner, 1907 †
Platyostoma insolita (FOSSIL) W.H. Webster, 1906 †
Rhabdocantha intermedia (FOSSIL) E.M. Fletcher, 1958 †
Cyclonema intermedium (FOSSIL) (Bradley, 1930 †)
Tachloconcha interupta (FOSSIL) (J. Perner, 1903 †)
Platyostoma invictus (FOSSIL) (Whidborne, 1891 †)
Platyostoma irrasum (FOSSIL) Fenton & Fenton, 1924 †
Platyostoma janthinoides (FOSSIL) Oehlert, 1877 †
Platyceras kahlebergensis (FOSSIL) Beushausen, 1884 †
Cyclonema karlsteinensis (FOSSIL) J. Perner, 1903 †
Naticonema kauffmani (FOSSIL) Peel, 1975 †
Stuckenbergispira kazanensis (FOSSIL) Mazaev, 2015 †
Nonorios kleistos (FOSSIL) Ebbestad & al., 2008 †
Platyceras laevicostatum (FOSSIL) Knod, 1908 †
Platyceras latum (FOSSIL) Keyes, 1888 †
Cyclonema laudabile (FOSSIL) J. Perner, 1903 †
Platyschisma laudoni (FOSSIL) Rollins, 1975 †
Platyceras leboutillieri (FOSSIL) A.H. Clarke, 1907 †
Platyceras lejeunii (FOSSIL) A.H. Clarke, 1908 †
Turbonellina lepida (FOSSIL) (de Koninck, 1843 †)
Cyclonema lepidula (FOSSIL) (J. Perner, 1903 †)
Cyclonema leptonotum (FOSSIL) (W.J. Raymond, 1905 †)
Cyclonema limatum (FOSSIL) Ulrich & Scofield, 1897 †
Platyceras lineare (FOSSIL) Kindle, 1900 †
Platyostoma lineata (FOSSIL) T.A. Conrad, 1842 †
Platyostoma lineata callosa (FOSSIL) (J.W. Hall †)
Cyclonema lineatum (FOSSIL) E.F.R.K. Koken, 1897 †
Platyschisma lingua (FOSSIL) E.K. Yoo, 1994 †
Barynema lirata (FOSSIL) (J.W. Hall, 1860 †)
Paffrathia lotzi (FOSSIL) (Frýda, 1998 †)
Platyostoma lutheri (FOSSIL) A.H. Clarke, 1904 †
Cyclonema lydiamariarum (FOSSIL) Peel, 1975 †
Platyceras magnificum (FOSSIL) J.W. Hall, 1859 †