TL;DR: Five species are placed in the Bolboceroides validus group, which is diagnosed, and an illustrated key to the males is given.
Abstract: Five species are placed in the Bolboceroides validus group, which is diagnosed. Four of the species are transferred from Bolboceras, viz. Bolboceras serripes Fairmaire, B. validum Klug (= rollii Muller), Β. carinicolle Laporte (= Β. capitatum Westwood, syn. nov.), B. scotti (Paulian); Bolboceroides kubaricus sp. nov. (Yemen) and B. serripes tsavoensis subsp. nov. (East Kenya, Somalia) are diagnosed. An illustrated key to the males is given. For Bolboceras carinicolle Laporte and B. capitatum Westwood lectotypes are designated. New records are given. In a footnote the synonymy of the names Bolboceras and Odonteus is briefly discussed.
TL;DR: The purpose of this application is to conserve the generic name Bolboceras Kirby, 1819 for a group of scarab beetles by giving it conditional precedence over the older name Odonteus Samouelle, 18 19 whenever they are considered to be synonyms.
Abstract: The purpose of this application, under Articles 23.9.3 and 8 1.2.3 of the Code, is to conserve the generic name Bolboceras Kirby, 1819 for a group of scarab beetles (family GEOTRUPIDAE) by giving it conditional precedence over the older name Odonteus Samouelle, 18 19 whenever they are considered to be synonyms. The name Bolboceras is threatened by a single usage by Krelljn 1990 of the otherwise unused name Odonteus.