Gatunek typowy
Producta analoga Phillips, 1836; Early Carboniferous; probably Bolland (Yorkshire), England

Opis

Very similar to Leptaena, but with both (ventral and dorsal) muscle field platforms elevated clear of valve floor and more substantial cardinal process.

Synonimy
? Adiaphragma Xian in Xu, Wan et Chen, 1978; Pseudoleptaena Miloradovich, 1947; ?Semileptagonia Karapetov, 1971

Zasięg czasowy

Devonian (Emsian) to Carboniferous (Namurian); cosmopolitan

Literatura