Gatunek typowy
Strophomena inaequistriata Conrad, 1842; Mid Devonian; Hamilton (New York), USA

Opis

Shell strongly concavoconvex with unequally parvicostellate ornament; ventral muscle field bounded by short and strong curved ridges posterolaterally, with anterior margin open; small erect cardinal process lobes; dorsal myophragm continuous with base of cardinal process continuing anteriorly, bifurcating into pair of short but prominent side septa that may be relatively straight or may curve inward.

Synonimy

Zasięg czasowy

Silurian (Prídolí) to Devonian (Givetian); cosmopolitan.

Literatura