Parallelepipedorhynchus , a new late Frasnian rhynchonellide (brachiopod) from the Dinant Basin, Belgium, and Parallelepipedorhynchidae n. fam.

Parallelepipedorhynchus trapezoides n.gen., n.sp. is erected for late Frasnian specimens from the southern flank of the Dinant Basin, Belgium, previously referred to Hypothyridina cuboides . It is designated the type for the new rhynchonellide family Parallelepipedorhynchidae. Most references to the occurrence of Terebratula, Rhynchonella, Hypothyris, Hypothyridina cuboides are incorrect. The stratigraphic implications of these misidentifications are discussed in detail.