Diagnoza

The juvenile shell comprising about 4.5 whorls. The shell is high trochospiral with a pointed apex. There are 15 axial ribs per whorl initially, while later the number of ribs increases up to 30-35 per whorl. Later in ontogeny, the axial ribs weaken and change into bundles of enhanced growth lines. On the adult whorls the nodes are scale-like with an incipient recess. The basal margin shows no angulation. The nodes on the base are weaker and more numerous than on the whorl flanks. The aperture is widely oval, slightly pointed anteriorly. The columella bears a distinct fold on its upper part.

Porównanie

Differs from “Turbo” meriani Goldfuss, 1844 in having a columellar fold, spiral ribs of nearly equal strength, less convex whorls, and a more elongated shell. Also differs from “Turbo” augur Goldfuss, 1844 in having only four spiral ribs while the type has five or six spiral ribs.

Autekologia

Występowanie geograficzne

Thurnau in Germany and Kłęby (Western Pomerania).

Zasięg czasowy

Late Oxfordian ‒ ?Kimmeridgian.

Materiały muzealne

135 juvenile and incomplete specimens (BGR, Buchholz, Beckert).

Literatura

Goldfuss, A. 1841-1844. Petrefacta Germaniae, Dritter Theil. 1‒128 Arnz & Comp.; Düsseldorf.

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

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