Rhyzobius unicolor is a species of beetle of the family Coccinellidae. It is found in Australia (Western Australia).
Description Adults reach a length of about . They have a broadly oval, moderately convex body. They are light brown or yellowish brown. The pubescence on the dorsum consists of appresed setae and darker stiff bristles, forming a wavy pattern on the elytra.
Etymology The name of the species refers to its uniformly coloured body.
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