Oncocephala cuneata is a species of beetle of the family Chrysomelidae. It is found in Liberia, Cameroon, Equatorial Guinea and the Democratic Republic of the Congo.
Adults reach a length of about 4.4âÂÂ5 mm. The head, pronotum and elytra are black, while the legs and antennae are dark brownish with black.
No host plant has been documented for this species.