Cyrtostropha subplicata (FOSSIL) (Lindström, 1884 †)
Aclisina subsutra (FOSSIL) Wang, 1982 †
Murchisonia subulata (FOSSIL) Tyler, 1965 †
Murchisonia subulata (FOSSIL) (T.A. Conrad, 1842 †)
Mesocoelia suspecta (FOSSIL) J. Perner, 1907 †
Murchisonia taltiensis (FOSSIL) Tschernischeff, 1893 †
Murchisonia tatei (FOSSIL) J. Donald, 1892 †
Michelia tenera (FOSSIL) J. Perner, 1907 †
Michelia tenue (FOSSIL) A.H. Clarke, 1907 †
Hormotoma tenuifilosa (FOSSIL) J. Donald, 1906 †
Murchisonia tenuissima (FOSSIL) J. Donald, 1887 †
Aclisina terebra (FOSSIL) J. Donald, 1898 †
Mesocoelia terebrans (FOSSIL) J. Perner, 1907 †
Glyphodeta terebriformis (FOSSIL) (J.W. Hall, 1856 †)
Hormotoma teretiformis (FOSSIL) (Billings, 1857 †)
Murchisonia tillesae (FOSSIL) Blodgett & Johnson,1992 †
Cyrtostropha torquata (FOSSIL) (F. McCoy, 1851 †)
Leptorima townsendii (FOSSIL) (J.J.F. Whiteaves,1895 †)
Murchisonia treponema (FOSSIL) Whidborne, 1892 †
Murchisonia tricincta (FOSSIL) d'Archiac & de Verneuil,1842 †
Murchisonia trilineata (FOSSIL) (F. Sandberger& G. Sandberger, 1854 †)
Cheilotoma tristriata (FOSSIL) (Münster, 1841 †)
Arribazona tschernyschewi (FOSSIL) (Jakowlew, 1899 †)
Glyphodeta tschernyschewi (FOSSIL) J. Donald 1895 †
Murchisonia turbinata (FOSSIL) H.G. Bronn, 1856 †
Murchisonia turriculata (FOSSIL) de Koninck, 1883 †
Murchisonia turriformis (FOSSIL) Grünberg, 1927 †
Murchisonia turris (FOSSIL) de Koninck, 1876 †
Coelocaulus turritiformis (FOSSIL) (J.W. Hall, 1852 †)
Plethospira ulrichi (FOSSIL) Schuchert, 1900 †
Plethospira ventricosa (FOSSIL) Ulrich & Scofield, 1897 †
Hormotoma vesta (FOSSIL) Billings, 1865 †
Murchisonia vicariana (FOSSIL) Whidborne, 1892 †
Murchisonia vincta (FOSSIL) (J.W. Hall, 1856 †)
Morania vsinuata (FOSSIL) Horný, 1953 †