"Genus endemic to New Caledonia and the Loyalty Islands. Three distinct populations of the same species, Hoploryctoderus tridens Montrouzier, 1860, tridens. sstr., Loyautés, tridens s.sp. caledonicus Prell, 1933 and tridens ssp. pinorum Paulian, 1991 ""

R. PAULIAN in "The Scarabaeoidea Coleoptera of New Caledonia", tropical fauna XXIX, ORSTOM editions, 1991