Macrocis testaceimembris is a species of beetle of the family Ciidae. It is found in Brazil (Santa Catarina).
Description Adults reach a length of about . The body is strongly convex and elongated with dense dorsal vestiture of short and thick yellowish setae. The pronotum has single punctation and the surface between the punctures has a hexagonal microreticulated sculpture. The lateral margins are weakly explanate, crenulated and barely visible for their entire lengths from above. The elytral punctation is dual and not seriate. Males have a frontoclypeal ridge bearing a pair of parallel, cylindrical and a bit flattened horns with rounded apices and very small abdominal sex patch, being an inconspicuous mark at the centre of the ventrite at the midline.
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