Heteronyx costulatus is a species of beetle of the family Scarabaeidae. It is found in Australia (Western Australia).
Description Adults reach a length of about . The clypeus, frons, pronotum and elytra are testaceous. There is a small, dark brown comma-shaped mark on each side of the base of the clypeus. The pronotum has a fringe of long setae along the anterior margin, while there are short setae on the disc of both the pronotum and elytra.
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