Classification Status . However, several significant characters of Diphyllostoma are not found in other members of the family Lucanidae or other scarabaeoids. These include abdomen with 7 ventrites, exposed second abdominal segment, exposed protrochantin, and protibial spur lacking. Diphyllostomatid and lucanids comprise the sister group to a clade that includes the families Glaphyridae, Trogidae, Pleocomidae, and Bolboceratidae. New World Genera of Diphyllostomatidae Diphyllostomatidae Diphyllostoma Ecology .
Females differ from males in having greatly reduced eyes and vestigial wings.
Life history information is scant. The adults are diurnal. Immatures are not known but are probably of the scarabaeoid form and probably live in the soil. Ph.D. Thesis, University of Pretoria, Pretoria, South Africa. FALL, H. C. 1901.