Mesoamericanonthophaguslatreille in the Dicranius and Mirabilis Species Groups (Coleoptera: Scarabaeidae)

The taxonomy and phylogeny of two related species groups of Mexican and Central American Onthophagus are considered. The dicranius group is composed of four species, including two new species, O . asperodorsatus and O . petenensis . The mirabilis group contains three species, one of these new, O . solisi . A fourth new species, O . quetzalis , shares characters with both species groups. All species in these groups are described and illustrated. A suggested phylogeny is presented. Our analysis indicates that these groups, including O . quetzalis , may be more closely related to Indo-Malaysian species than to other New World groups of Onthophagus .