Specimen ZPAL. Ga.12/15 from the Late Oxfordian of Kłęby (Western Pomerania) in Apertural and Apical view.

Diagnoza

Porównanie

The shell is broadly oval. The early teleoconch whorls are straight in the abapical part of the flank and weakly rounded toward the adapical suture. On the last teleoconch whorl, just below the suture, a sturdy embankment-like structure is present. This structure begins to develop on the preceding whorl and it strengthens during ontogeny. Simultaneously a strong ramp develops above this embankment. A similar structure is present close to the demarcation between the flank and the base but it is much weaker than that on the adapical part of the whorl. The flank between both embankments is concave. The base is weakly convex but further details are not observable. The aperture is ovate; the inner and outer lips are broken.

Autekologia

Występowanie geograficzne

Kłęby (Western Pomerania).

Zasięg czasowy

late Oxfordian

Materiały muzealne

One incomplete specimen (ZPAL Ga.12/15).

Literatura

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