The Echinoid Directory

Hypsoheteroclypeus Kier, 1962, p. 106, 112

Classification and/or Status error pro Hypsoheteroclypus Szörenyi, 1953, p. 76.
Remarks Kier, P. M. 1962. Revision of the cassiduloid echinoids. Smithsonian Miscellaneous Collections 144, iv+1-262.