Baylea supercrenata (FOSSIL) Weller, 1929 †
Stenoloron swallovana (FOSSIL) (J.W. Hall, 1856 †)
Salterospira tabulata (FOSSIL) Batten, 1966 †
Baylea tabulata (FOSSIL) (B. Phillips, 1836 †)
Lahnospira taeniata (FOSSIL) (G.A. Goldfuss, 1844 †)
Mourlonia talboti (FOSSIL) (Dickins, 1963 †)
Ananias talpaensis (FOSSIL) B.S. Kues & Batten,2001 †
Mourlonia teichertensis (FOSSIL) Cook & al., 2003 †
Baylea teicherti (FOSSIL) Cook & al., 2003 †
Umbotropis telleri (FOSSIL) (Frech, 1894 †)
Mourlonia tenuiarata (FOSSIL) (C.L.F. von Sandberger& C.L.F. von Sandberger, 1853 †)
Mourlonia tenuilineata (FOSSIL) (Holzapfel, 1882 †)
Euryzone tenuispira (FOSSIL) (J.W. Hall, 1879 †)
Apachella texana (FOSSIL) (Girty, 1909 †)
Glabrocingulum texanum (FOSSIL) Batten, 1989 †
Zlichomphalina texta (FOSSIL) (Barrande in J. Perner,1907 †)
Mourlonia textiligera (FOSSIL) (F.B. Meek, 1871 †)
Schizolopha textilis (FOSSIL) Ulrich & Scofield, 1897 †
Mourlonia textus (FOSSIL) Hyde, 1953 †
Glabrocingulum thailandensis (FOSSIL) A. Nützel & Ketwetsuriya,2016 †
Latitaenia thulensis (FOSSIL) (E.F.R.K. Koken, 1896 †)
Glabrocingulum tingriensis (FOSSIL) Pan & S. Shen, 2008 †
Mourlonia toyomensis (FOSSIL) Murata, 1969 †
Pleurorima tranquilla (FOSSIL) J. Perner, 1907 †
Dictyotomaria transcostata (FOSSIL) Wang, 1980 †
Pandospira transitoria (FOSSIL) (C. Gemmellaro, 1889 †)
Apachella translirata (FOSSIL) Winters, 1956 †
Neoparaliospira trebotovensis (FOSSIL) Frýda, 1998 †
Glyptotomaria triassica (FOSSIL) Yin & E.L. Yochelson,1983 †
Devonorhineoderma tricincta (FOSSIL) (G.A. Goldfuss, 1844 †)
Baylea trifibra (FOSSIL) Rollins, 1975 †
Peruvispira trifilata (FOSSIL) (J.B.M. Dana 1847 †)
Euconospira trochiformis (FOSSIL) Longst, 1912 †
Whidbornia trochoides (FOSSIL) (Whidborne, 1889 †)
Nodulispira tuberculata (FOSSIL) (T. Kase & Nishida,1988 †)