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), C. bitorquata (Hébert et Eudes−Deslongchamps, 1860), and most probably even C. sauvagei (Cossmann, 1895), represent one highly variable species.

Autekologia

Występowanie geograficzne

Europe; in Poland Częstochowa region and Kłęby borehole 1/37.

Zasięg czasowy

Mid and Late Jurassic.

Materiały muzealne

Material from Europe, including ca. 30 mostly juvenile specimens from Germany and northern Poland (boreholes: Heringsdorf 4/63, Karlshagen 1/62, Kłęby 1/37, Löcknitz 1/63, Ringenwalde 1/65, Rubkow 2/64, Usedom 2/61 and Wusterhusen 1/64, collections University of Greifswald, Schneider); additionally 30 shells (ZPAL) from Kawodrza−Sowa (Late Bajocian), 20 shells from Blanowice (Bathonian), 6 shells from Ogrodzieniec (Bathonian), 1 juvenile shell from Gnaszyn (Bathonian), 2 juveniles from Kłobuck borehole 21 (?Bathonian).

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.

Gründel, J. 2000. Archaeogastropoda aus dem Dogger Norddeutschlands und des nordwestlichen Polens. Berliner geowissenschaftliche Abhandlungen, Reihe E, 34: 205–253.119. Riselloidea Cossman, 1909

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.