Gatunek typowy
‘Orthis eifeliensis Schnur, 1853; Eifel, Germany; Mid Devonian.

Opis

Valves dorsibiconvex and unisulcate ; ventral interior with bilobed muscle scar and median ridge, bifurcate anteriorly in front of muscle field; dorsal interior with trilobed cardinal process on low notothyrial platform.
 

Synonimy

Zasięg czasowy

Mid Devonian (Eifelian) to Early Carboniferous (Tournaisian); Europe (Poland, Germany, France), Asia (Myanmar) and Africa (Morocco, Mauretania)

Literatura