A new genus and species of geniatine scarab is described from southeastern Brazil. The genus Xenogeniates is characterized by the unusual shape of the mesosternum, which is strongly invaginated and concave. Unusual characteristics of the taxon are discussed in relation to the Rutelinae and the Scarabaeidae.
RESUMEN Se describe un nuevo género y especie de escarabajo geniatine del sureste de Brazil. El género Xenogeniates se caracteriza por la forma inusual del mesosterno que es profundamente invaginada y concava. Características inusuales de este taxon se discuten en relación a Rutelinae y Scarabaeidae.