Specimen ZPAL Ga.9/221 from the Bathonian (Mid Jurassic) of Faustianka (Częstochowa region) in lateral and apical view.

Diagnoza

Protoconch hyperstrophic, coaxial. Demarcation from teleoconch clearly visible, orthocline. Teleoconch slender, ornamented with sigmoidal, axial ribs (usually 28–30 ribs per whorl) and, on early whorls, blunt spiral ribs.

Porównanie

Very similar to Recent C. sarsi Nordsieck, 1972 which differs by broader axial ribs and the presence of weak spiral ribs on all whorls of the teleoconch.

Autekologia

Występowanie geograficzne

Faustianka (Częstochowa region) and Kłęby borehole 1/37 (West Pomerania), Poland.

Zasięg czasowy

Bathonian (Mid Jurassic).

Materiały muzealne

Two shells from Bathonian (Mid Jurassic) of Faustianka (Częstochowa region) and material from Kłęby borehole 1/37 (West Pomerania), Poland.

Literatura

Gründel, J. 1998. Heterostropha (Gastropoda) aus dem Dogger Norddeutschlands und Nordpolens. II. Weitere Allogastropoda. Freiberger Forschungshefte C 474, 1–37.

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