Diagnoza

The shell was probably very wide and oval. Possibly the front end was rounded a little more narrowly than the rear end. The apex is clearly closer to the front end. The area between it and the front edge is concave in the current state, the concavity may have been increased by the compression. The slope towards the rear end is slightly convex. The whole shell is covered with numerous, weakly reinforced growth lines. The shell is folded concentrically like a corrugated sheet (probably by crushing). At the rear end there are more than 20 weak radial ribs.

Porównanie

No radial ribs are present in similar Patella cingulata Münster in Goldfuss, 1844, Emarginula scalaris Sowerby sensu Greppin 1888, or Symmetrocapulus? corrugatus Sohl, 1965.

Autekologia

Występowanie geograficzne

Poland and France.

Zasięg czasowy

Mid Jurassic

Materiały muzealne

Holotype (NHMW) and material from France.

Literatura

Cossmann, M. 1885. Contribution à l’étude de la faune de l’étage Bathonien en France (Gastropodes). Mémoirs de la Société géologique de France (3), 3, 1–374.

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.

Fischer, J.-C.1969. Géologie, paléontologie et paléoécologie du Bathonien au Sud-Ouest du Massif Ardennais. Mémoires du Muséum National d’Histoire Naturelle, nouvelle Série, Série C, Sciences de la Terre, 20, 1–319.