Diagnoza

Shell large, trochiform, sharply gradate. Ramp on adult whorls almost flat and orthogonal to the spire axis. Shoulder sharp, with strong and somewhat widely spaced nodes. Outer face flat and steep, almost twice the ramp. Nodose angulation at periphery, forming a spiral peribasal swelling. Base low, with wide and deep umbilicus. Selenizone of adult shell flat and wide, running slightly above mid‐line of outer face. Ornament of adult shell composed of numerous and strong spiral threads and very fine collabral threads. Base ornamented by strong spiral threads and collabral ribs commonly more marked on its periumbilical band.

Porównanie

Pleurotomaria constricta Eudes-Deslongchamps, 1849 sensu Fischer & Weber 1997 is very similar (almost identical).

Autekologia

Występowanie geograficzne

Calvados (northern France), Dorset (south‐western England), Central High Atlas (Morocco), south‐western Luxembourg; In Poland only in Balin.

Zasięg czasowy

Bajocian-Bathonian, probably also Callovian

Materiały muzealne

Material from Europe (MNHNL),1 specimen (NHMW 1853/0038/0089) from Balin.

Literatura

Fischer, J.-C. & Weber, Ch. 1997. Révision critique de la paléontologie Française d’Alcide d’Orbigny. Vol. II: Gastropodes jurassiques – 300 pp.; Masson, Paris.

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 für Mineralogie und Petrographie, Geologie und Paläontologie, Anthropologie und Prähistorie, 193-288.

Hagele, G. 1997. Juraschnecken. Fossilien. Special Volume 11: 1–144.

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

Monari, S. & Gatto, R. 2013. Pleurotomaria DeFrance, 1826 (Gastropoda, Mollusca) from the Lower Bajocian (Middle Jurassic) sediments of Luxembourg, with considerations on its systematics, evolution and palaeobiogeographical history. Palaeontology 56 (4): 751–781.

Münster, G. V. 1844. in:  A. Goldfuss 1826–1844. Petrefacta Germaniae, tam ea, Quae in Museo Universitatis Regiae Borussicae Fridericiae Wilhelmiae Rhenanea, serventur, quam alia quaecunque in Museis Hoeninghusiano Muensteriano aliisque, extant, iconibus et descriiptionis illustratae. Düsseldorf (Arnz & Comp.).