Plectris subcarinata is a species of beetle of the family Scarabaeidae. It is found in Brazil (Santa Catarina).
Adults reach a length of about 14âÂÂ15 mm. They are brown and slightly glossy. The upper and lower surfaces are very densely covered with somewhat protruding light setae. These setae are mixed with not fairly short hairs, which are particularly numerous (and longer) on the pygidium. The hairs on the thorax are also somewhat longer.