Gatunek typowy
Nerita sigaretina Buvignier, 1843. Late Jurassic, St. Mihiel, France.

Opis

Shell globose, with slightly protruding spire of shouldered whorls; last whorl with one or more angulations; ornament collabral ridges cancellated in same species by spirals; aperture much reduced by inner lip septum which is not dentate along its convex margin, and is continuous with callus rather widespread over base; outer lip beveled from thick wall to thin edge; shallow adapical channel present.

Synonimy

Zasięg czasowy

Mid Jurassic (Bathonian) to Late Cretaceous.

Literatura

Zittel, K. 1882. Handbuch der Palaeozoologie: Abt. I. Palaezoologie, Vol. 2: Mollusca und Arthropoda. Munchen-Leipzig, 1881-1885.