Specimen MZ VIII Mg 4252/1 from the Callovian (Mid Jurassic) of Łuków (block in glacial drift) in lateral and apical view.

Diagnoza

Elongated shell with relatively high whorls, 2.38 times as high as broad. Protoconch 1 and protoconch 2 umbilicus emerging above first teleoconch whorl. Teleoconch whorls high in relation to width, rounded only close to suture on both whorl sides. Ramp well pronounced with abapical furrowat border.

Porównanie

Autekologia

Występowanie geograficzne

Germany and Poland (Chrząszczewska Island  and Łuków, block in glacial drift).

Zasięg czasowy

Callovian, Mid Jurassic.

Materiały muzealne

Material from Germany and Poland including eight shells from Callovian of Łuków (block in glacial drift), Poland.

Literatura

Gründel, J. 1997b. Heterostropha (Gastropoda) aus dem Dogger Norddeutschlands und Nordpolens. III. Opisthobranchia. Berliner Geowissenschaftliche Abhandlungen, Reihe E 25, 177–223.

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