Holotype ZPALGa.9/199 from sample R1 of Wąwał (Early Valanginian, Early Cretaceous); lateral, apical and umbilical view

Diagnoza

Turbiniform shell, thick, smooth,shiny. Peristome circular with large, blunt tooth on inner lip. Umbilicus absent.

Porównanie

The species under consideration is most similar to Ataphrus typus (Gemmelaro, 1878), the type species of Plocostylus Gemmelaro, 1878 but it differs in having larger teeth on the inner lip.

Autekologia

Występowanie geograficzne

Type locality only.

Zasięg czasowy

Sample R1, Tirnovella pertransiens Zone, Valanginian.

Materiały muzealne

One shell from the type locality.

Literatura

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