|Range||Cretaceous (Albian to Maastrichtian) of Europe, the Middle East and Cuba.|
|Remarks||Easily distinguished from Pygasteridae on the basis of its periproct shape and position.
Wagner, C. D. & Durham, J. W. 1966. Holectypoids. Pp. U440-450 in Treatise on Invertebrate Paleontology. Part U Echinodermata 3. Geological Society of America and Unievrsity of Kansas Press.