Gatunek typowy
Gnaszynium baumilleri Kaim, 2004. Bathonian (Mid Jurassic), Gnaszyn, Częstochowa region, Poland. 

Opis

Protoconch with three whorls and stable rate of expansion, ornamented adapically with low, axial ribs. Protoconch peristome with sinusigera notch. Teleoconch cap−like, ornamented with collabral, densely spaced, low ribs.

Synonimy

Zasięg czasowy

Mid Bathonian (Mid Jurassic)

Literatura

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