Specimen ZPAL Ga.9/170 from the Oxfordian (Late Jurassic) from Kłęby, West Pomerania; lateral and apical view.

Diagnoza

Shell pupiform, with very weakly convex whorls. Teleoconch ornamentation with wide, blunt axial ribs and flat-topped, band-like spiral ribs. Later in ontogeny axial ribs disappearing.

Porównanie

The protoconch is unknown, therefore its status remains unclear as does the status of the whole genus.

Autekologia

Występowanie geograficzne

France (Cordebugle, Normandy); in Poland only Kłęby outcrop, (West Pomerania).

Zasięg czasowy

Upper Oxfordian (Late Jurassic). 

Materiały muzealne

Material from France and more than 100 specimens from Kłęby, Poland (BGR, Buchholz, Beckert, GG, ZPAL). 

Literatura

Cossmann, M. 1913. Contributionsàla paléontologie Française des terrains jurassiques. III. Cerithiacea et Loxonematacea. Mémoires de la Société Géologique de France, série Paléontologie 46, 1–263.

Dmoch, I. 1971. Osady i fauna górnojurajska z Kłębów na Pomorzu Zachodnim. Studia Societatis Scientarum Torunensis. Sectio C (Geographia et Geologia), 7, 1-60.

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

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