Diagnoza

Porównanie

Large, relatively evolute conchs collected do not show any remnants of suture. The shell surface is smooth. The smallest specimens are the most involute, whereas the largest specimen shows rather evolute coiling, but all of them may represent the same species which is, however, impossible to prove because of lack of data on suture morphology. Their identity with the Erdbach Limestone species is at least likely. The genus, characterised by parallel-sided ventral lobe, is not known below the Osagean. Thus, this is one of its oldest species.

Autekologia

Występowanie geograficzne

Ostrówka in the Holy Cross Mountains, Poland.

Zasięg czasowy

Late Tournaisian.

Materiały muzealne

Literatura

Dzik, J. 1997. Emergence and succession of Carboniferous conodont and ammonoid communities in the Polish part of the Variscan sea. Acta Palaeontologica Polonica 42, 57-170.