Diagnoza

The protoconch is transaxial, and up to half of it is embedded into the succeeding teleoconch whorl. The shell is high trochospiral. The flanks of the teleoconch whorls are weakly convex. The ramp is narrow but distinct. Just below the ramp a spiral furrow is developed. The adapical one-third of the whorl is smooth and the rest is ornamented by numerous spiral grooves which become stronger towards the base. The furrows vary in strength and the stronger furrows are intercalated with weaker furrows. The former are more common than the latter. The growth lines are prosocyrt and their adapical portion is bent strongly backward. The aperture is hornlike and is elongated posteriorly and widened anteriorly.

Porównanie

The type material and material from Kłęby differs slightly in the pattern of ornamentation but most probably the differences caused by the imperfect preservation of type material.

Autekologia

Występowanie geograficzne

France (Trouville probably also Cordebugle), Kłęby (Western Pomerania) 

Zasięg czasowy

Upper Jurassic; in Poland only  Late Oxfordian (Late Jurassic)

Materiały muzealne

Two specimens from Schmidt’s colection (BGR X 05199 and 05207) and 24 specimens (BGR and Buchholz).

Literatura

Cossmann, M 1895. Essais de Paléoconchologie Comparée. Premiere Livraison. 161 pp. M. Cossmann, Comptoir Géologique; Paris.

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

Schmidt, M. 1905. Über Oberen Jura in Pommern. Abhandlungen der Königlich Preußsischen Geologischen Landesanstalt und Bergakademie, Neue Folge, 41, 1-222.