Gatunek typowy
Leptaena caudata Schnur, 1854; Mid Devonian (Givetian); Gerolstein, Germany.

Opis

Biplanar profile in central disc, gently resupinate and sharply geniculate ventrally with sulcus present in concave anterior margin; unequally parvicostellate ornament; large, bilobed, weakly impressed ventral muscle field; strong dorsal muscle-bounding ridges; dorsal side septa absent or weakly developed; thin dorsal median septum with prominent thickening centrally.

Synonimy
Glossostrophia Williams, 1950; Altaestrophia Bublichenko, 1956

Zasięg czasowy

Devonian (Eifelian to Givetian); Euroasia and Africa

Literatura