Gatunek typowy
Neritopsis guerangeri Davoust, 1855; Bathonian, France.

Opis

Naticiform shell with lacking to distinct spire. The protoconch consists of a little more than two whorls, its diameter varies from 0.4 to 0.6 mm. The whorls of the teleoconch are convex without any sculpture or with a weak spiral sculpture. The growth lines are straight to weakly sinuous and distinctly prosocline. Their apical part is prosocyrt. The aperture is broadly oval. The inner lip has a callus which sometimes covers the umbilicus.

Synonimy
Lobostoma Cossmann, 1885

Zasięg czasowy

Jurassic to Cretaceous.

Literatura

Chelot, E. 1886. Supplément à la géologie de la Sarthe de A. Guillier. Bulletin de la Société géologique de France (3), 15: 9.