Specimen NHMW 1867/0008/0009 a from Mid Jurassic of Balin in lateral and ventral view,

Diagnoza

Porównanie

The coils are convex, the seams deepened. The sculpture consists of three strong, crenulated spiral ribs. The base has a narrow umbilicus and four weakening spiral and crenulated ribs are formed. The umbilicus is surrounded by a bulge with strong crescent-shaped ribs, which is followed by a crenulated spiral rib in the interior of the umbilicus. Metriomphalus davoustii (d’Orbigny, 1853), M. segregatus (Hébert & Eudes- Deslongchamps, 1860) and M. sp. sensu Gründel (2009) have significantly fewer thickenings on the spiral ribs of the base, as well as on the bulge that encircles the umbilicus.

Autekologia

Występowanie geograficzne

Balin, Poland.

Zasięg czasowy

Mid Jurassic.

Materiały muzealne

One specimen NHMW 1867/0008/0009a

Literatura

Gründel, J. 2012. Neubearbeitung der von Laube 1867 beschriebenen Gastropoden fauna aus dem mittleren Jura von Balin/Polen. Annalen des Naturhistorischen Museums in Wien. Serie A, 114, 193–288.

Hébert, M. & Eudes - Deslongchamps, E. 1860. Mémoire sur les fossiles de Montreuil-Bellay (Maine-et-Loire), 1re partie. Céphalopodes et Gastéropodes. Bulletin de le Société Linnéenne de Normandie, 5, 153–240

Laube, G. C. 1867. Die Gastropoden des braunen Jura von Balin. Denkschriften der kaiserlichen Akademie der Wissenschaften, 28, 1–28.