Specimen ZPAL Ga. 9/119 from the Bathonian (Mid Jurassic) of Ogrodzieniec (Częstochowa region); lateral and apical view.

Diagnoza

Teleoconch conical. First juvenile whorl of teleoconch ornamented with weak axial ribs. Later in ontogeny whorls angulated at two keels, which are close to suture on both whorl sides. Keels ornamented with short spines. Each spine from upper keel connected with another one from lower keel by oblique rib−like folds. Base sculptured with strong ribs. Umbilicus absent.

Porównanie

Calliotropis biarmata (Münster, 1844) and Calliotropis bitorquata (Hébert et Eudes−Deslongchamps, 1860), and most probably even Calliotropis sauvagei (Cossmann, 1895), represent varieties of one highly variable species.

Autekologia

Występowanie geograficzne

Europe; in Poland Częstochowa region.

Zasięg czasowy

Mid and Late Jurassic.

Materiały muzealne

Material from Europe and Thirty shells from Kawodrza−Sowa (Late Bajocian), twenty shells from Blanowice (Bathonian), six shells from Ogrodzieniec (Bathonian), one juvenile shell from Gnaszyn (Bathonian), and two juveniles from Kłobuck borehole 21 (?Bathonian), all Częstochowa region, Poland.

Literatura

Cossmann, M. 1924. Extension dans les Deux−Sèvres de la faune du Callovien de  Montreuil−Bellay. Mémoires Société Géologique et Minéralogique de Bretagne 1, 1–53.

Hébert, E. and Eudes−Deslongchamps, E. 1860. Mémoire sur les fossiles de Montreuil−Bellay (Maine−et−Loire). 1re. partie. Céphalopodes et Gastéropodes. Bulletin de la Société linnéenne de Normandie 5, 153–240.

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

Münster, G.G., zu 1844. Petrefacta Germaniae, Dritter Theil In: G.A. Goldfuss (ed.), Petrefacta Germaniae, Dritter Theil. 128 pp. Arnz and Comp., Düsseldorf.