Tainoceras rotundatum (FOSSIL) Miller & Unklesbay,1942 †
Tainoceras schellbachi (FOSSIL) Miller & Unklesbay,1942 †
Tainoceras sexlineatum (FOSSIL) Tucker, 1976 †
Tainoceras toulai (FOSSIL) C. Gemmellaro, 1889 †
Tainoceras trautscholdi (FOSSIL) (L. Waagen, 1879 †)
Tainoceras trimuense (FOSSIL) Reed, 1944 †
Tainoceras wyomingense (FOSSIL) Miller & A. Thomas,1936 †
Tanchiashanites marginalis (FOSSIL) J.K. Zhao, 1954 †
Tirolonautilus crux (FOSSIL) (Stache, 1877 †)
Tirolonautilus sebedinus (FOSSIL) (Stache, 1877 †)
Trachynautilus nodulosus (FOSSIL) (Arthaber, 1896 †)
Trachynautilus telleri (FOSSIL) Mojsisovics, 1902 †