Holotype ZPAL Ga.9/3 from the Valanginian (Early Cretaceous) of Wąwał in lateral and apical view; white arrow indicate demarcation between protoconch and teleoconch.

Diagnoza

Protoconch obtusely conical. Demarcation between protoconch and teleoconch is well developed, opisthocyrtic. Teleoconch with weakly convex whorls ornamented by striae composed of small pits. Drop-like peristome with weak posterior canal terminally thickened.

Porównanie

The obtusely conical protoconch and terminally thickened peristome are characteristic for the Rissoidae. The weak microornamentation of the teleoconch is similar to that observed among Recent species of Zebina and Schwartziella.

Autekologia

Występowanie geograficzne

Only in type locality.

Zasięg czasowy

Valanginian.

Materiały muzealne

424 shells.

Literatura

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