(Hust.) Nakov, Guillory, M.L.Julius, E.C.Ther. and A.J.Alverson 2015
Credit: David Burge
Valve face flat
Valve center colliculate
Single fultoportula
Single rimoportula
The valve face is flat, and the valve center is colliculate. A single fultoportula is present. A single rimoportula is present on a shortened stria, opposite a single central fultoportula.