Gatunek typowy

Opis

Shell in profile dorsally geniculate with ornament uniformly costellate and weak rugae; deeply impressed and bilobed ventral muscle field with short ventral median septum; field of dorsal muscle strongly impressed, especially posteriorly; thin dorsal median septum centrally only.

Synonimy

Zasięg czasowy

Mid Devonian (Eifelian) to Late Devonian (Frasnian); Europe (Poland and probably Germany) and Australia.

Literatura