Gatunek typowy
Trochus anglicus Sowerby, 1818; late Pliensbachian, Somerset (England)

Opis

Shell of medium to large‐size; trochiform, moderately high to depressed, anomphalous to broadly phaneromphalous, gradate, with outer whorl face flattened, at least in earlier growth stages; selenizone moderately broad, near mid-whorl; ornament sinuous spiral cords with tubercles at shoulder and in some species at margin of base. 

Synonimy
Talantodiscus Fischer, 1885

Zasięg czasowy

Mid Triassic (Anisian) to Early Cretaceous (Aptian)

Literatura

Defrance , M.J.l. 1826. Genus Pleurotomaria. In: F. Cuvier (ed.) Dictionnaire des Sciences Naturelles, 41, 381. Paris & Strasbourg.