Based on a single individual 9 mm in diameter. Mortensen (1940) considered it highly likely that it was identical to Lissodiadema, the differences being almost entirely attributable to the small size of the specimen.
Mortensen, T. 1940. A monograph of the Echinoidea. Volume III. 1, Aulodonta. C. A. Reitzel, Copenhagen.
Agassiz, A. & Clark, H. L. 1908. Preliminary report on the Echini collected, in 1902, among the Hawaiian Islands, by the U.S. Fish Comussion steamer "Albatross", in charge of Commander Chauncey Thomas, U.S.N., commanding. Bulletin of the Museum of Comparative Zoölogy at Harvard College, 50/8: 231-259.