Diagnoza

Thickly discoidal conch at 12-25 mm diameter with a narrow umbilicus; umbilical margin angular, two longitudinal ventrolateral grooves; ornamentation with fine radial ribs up to 8mm diameter; later with only uncrenulated growth lines, without ribs and with very weak spiral lines; course of the growth lines strongly biconvex, with prominent and narrow ventrolateral projection.

Porównanie

Autekologia

Występowanie geograficzne

Southwest Portugal, Belgium (Antwerpen, Liège, Hainaut), Netherlands, Great Britain (Devonshire, Yorkshire), Germany (Rhenish Slate Mts.), Poland (Lublin Coal Basin), Russia (South Urals), Ukraine (Donets Basin), Uzbekistan (Fergana) and China (Guangxi, Ningxia).

Zasięg czasowy

Carboniferous; Moscovian; in Poland only Namurian, above B. bilinguis

Materiały muzealne

Literatura

Bisat, W.S. 1924. The Carboniferous goniatites of the North of England and their zones. Proceedings of the Yorkshire Geological Society 20: 40-124.

Korejwo, K. 1969. Stratigraphy and palaeogeography of the Namurian in the Polish Lowland. Acta Geologica Polonica 19 (4): 609-709.

Korejwo, K. 1986. Biostratigraphy of the Carboniferous deposits of the Świdnik blocks (Lublin Coal Basin). Acta Geologica Polonica 36 (4): 337-346.

Korejwo, K. & Teller, L. 1967a. Some Horizons of Upper Carboniferous Goniatites of the Lublin Basin. Bulletin de l’ Academie Polonaise des Sciences. Serie des Sciences geologiques et  geographiques 15 (4): 207-209.

Korejwo, K. & Teller, L. 1968a. Stratigrafia karbonu zachodniej części niecki lubelskiej. Acta Geologica Polonica 18 (1): 153-177.

Korn, D.  2007. Goniatiten von der Namur/Westfal-Grenze im Rheinischen Schiefergebirge (Cephalopoda, Ammonoidea; Oberkarbon. Deutschland Geologie und Paläontologie in Westfalen, Heft 69: 5-45