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