Bolbelasmus Boucomont, 1910

Li, Chun-Lin & Wang, Chuan-Chan, 2024, A systematic review of the genus Bolbelasmus Boucomont (Coleoptera, Geotrupidae, Bolboceratinae) from Indochina and surrounding areas, ZooKeys 1191, pp. 287-305 : 287

Bolbelasmus Boucomont, 1910

Diagnosis.

Species of Bolbelasmus are small to medium-sized (5.6-15.2 mm in body length) and can be recognized by the glossy, unicolored, reddish-brown to black dorsal surface; presence of a conical frontal tubercle with a rounded or bifurcated tip in males; transverse frontal carina present in females; eyes protruding, divided by a canthus anteriorly, canthus with anterior margin smooth; antennal club with first segment glabrous on inner side; pronotum usually quadrituberculate in major males (vestigial or reduced to bituberculate in minor males), females with transverse carina only; first elytral stria terminated by scutellum; parameres usually weakly sclerotized.