Ataenius brouni, Broun's scarab, is a species of beetle of the family Scarabaeidae. It is found in Australia (Australian Capital Territory, New South Wales, South Australia, Tasmania) and New Zealand.

Description Adults reach a length of about . They have an elongate-oval, moderately shiny, reddish black to black body, with the margins of the pronotum and legs reddish. The elytra are often also reddish.

Life history Specimens have been collected under moss and stones, but also in pastures and lawns.

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