Cephaloleia dimidiaticornis is a species of beetle of the family Chrysomelidae. It is found in Brazil (São Paulo) and Peru.
Description Adults reach a length of about 4–4.9 mm. Adults are reddish-brown, with the eyes and antennomeres 7–11 darker.
Biology Adults have been collected on an unidentified palm (Arecaceae) species.
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