Rhyzobius fasciculatus is a species of beetle of the family Coccinellidae. It is found in Australia (Queensland, New South Wales).

Description Adults reach a length of about . They have a broadly oval, strongly convex body. They are black, with the anterior angles of the pronotum usually pale. The antennae are yellowish brown. The pubescence of the dorsum consists of appresed setae and moderately dense dark stiff bristles. The pubescence forms a whorled pattern on the elytra.

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