Gatunek typowy
Turbo subduplicatus d’Orbigny, 1850; Toarcian-Aalenian, France.

Opis

Shell shape similar to Amphitrochus but the anomphalous base is strongly convex. Distinct ribs run over the base from the nodes of the suprasutural bulge to the center. Aperture without any abapical channel. The columellar inner lip is crescent-shaped widened and its boundary against the base forms a sharp rib.

Synonimy

Zasięg czasowy

Jurassic

Literatura

Gründel, J. 2009. Zur Taxonomie der Gattungen Amphitrochus Cossmann, 1907 und Costatrochus n. gen. (Gastropoda, Vetigastropoda, Turbinidae) im Jura. Berliner paläobiologische Abhandlungen, 10, 199–214.