Front view of the head of a bess beetle, Odontotaenius disjunctus (Coleoptera: Passalidae) showing the typical horn, antennae, and the rounded, chisel-like mandibles. These mandibles are perfectly located at the front of the head and enable the beetle to easily chew through dead wood. The compound eyes are located at the base of the antennae and are protected by odd projections of the integument. A colony of mites occurs around the base of the horn.
Front view of the head of a bess beetle, Odontotaenius disjunctus (Coleoptera: Passalidae) showing the typical horn, antennae, and the rounded, chisel-like mandibles. These mandibles are perfectly located at the front of the head and enable the beetle to easily chew through dead wood. The compound eyes are located at the base of the antennae and are protected by odd projections of the integument. A colony of mites occurs around the base of the horn.
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