Juvenile specimen (Buchholz collection) from the Late Oxfordian of Kłęby, (Western Pomerania) in Lateral and Apical view.

Diagnoza

Porównanie

A keel-like spiral rib constitutes an angulation of the lateral whorl flanks. A slightly weaker rib is situated at the adapicalmost part of the lateral flank of the whorl. Both spiral ribs are ornamented by strong nodes that are additionally strengthened by poorly expressed axial ribs and enhanced growth lines. The surface of the base is angulated at its strongest spiral rib, which lacks any nodes. Both sides of this rib are slightly concave. The base is additionally ornamented abapically by two weaker spiral ribs that also lack any nodes. The umbilicus is bordered by a sturdy spiral rib that bears strong but blunt nodes on its surface.

Autekologia

Występowanie geograficzne

Kłęby (Western Pomerania).

Zasięg czasowy

late Oxfordian.

Materiały muzealne

Three imperfectly preserved juvenile specimens (BGR and Buchholz).

Literatura

Gründel, J & Kaim, A. 2006. Shallow-water gastropods from Late Oxfordian sands in Kłęby (Pomerania, Poland). Acta Geologica Polonica 56, 2, 121-157.