Rhyzobius decoratus is a species of beetle of the family Coccinellidae. It is found in South Africa (Gauteng, Orange Free State, KwaZulu-Natal, Eastern Cape).
Description Adults reach a length of about . They have an elongate oval, flattened body. They are mostly dark brown or chestnut brown with a black pattern on the elytra. There is moderately long pubescence on the dorsum.
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