Cephaloleia deplanata is a species of beetle of the family Chrysomelidae. It is found in Brazil (Bahia, Rondonia), Suriname and Venezuela.
Adults reach a length of about 4âÂÂ5 mm. Adults are pitchy-black except the lateral margin of the pronotum and elytron. The latter has a metallic sheen. The antennae and venter are brownish.
Adults have been collected feeding on Elaeis guineensis.