Rhyzobius brunneus is a species of beetle of the family Coccinellidae. It is found in Australia (New South Wales).
Description Adults reach a length of about . They have an elongate oval, moderately convex body. They are dark brown or dark reddish brown, with the antennae light brown or yellowish brown. The pubescence on the dorsum consists of appresed setae and suberect bristles and forms a weak wavy pattern on the elytra.
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