Belongs within: Scarabaeoidea.Contains: Aulacocyclus. The Passalidae, bess beetles, are a group of elongate, flat-bodied scarabaeoid beetles that live in subsocial groups in rotting logs (Schuster 2002). In members of the subfamily Passalinae, the procoxae do not project much below the prosternum, and the head usually bears paired tubercles. The Indo-Australian Aulacocyclinae have the intercoxal process… Continue reading Passalidae