Gatunek typowy

Opis

Type species: Crossostoma pratti Morris & Lycett, 1851. Inferior Oolite (Mid Jurassic), England
Thick, turbinate depressed shell with deep umbilicus closed by thickened glaze of inner lip. Adult whorls smooth. Fully grown shell having thickened apertural margin. Aperture round.

Synonimy

Zasięg czasowy

Early to Mid Jurassic.

Literatura

Kaim, A. 2004. The evolution of conch ontogeny in Mesozoic open sea gastropods. Palaeontologia Polonica 62, 3–183.

Morris, J. and Lycett, J. 1850. A monograph of the Mollusca from the Great Oolite, chiefly from Minchinhamton and the coastof Yorkshire. Part I. Univalves. Palaeontographical Society Monograph 1850, 1–130.