Ocnosispa armata is a species of beetle of the family Chrysomelidae. It is found in Paraguay.
Description Adults are broadly elongate, scarcely dilated behind, subdepressed and fulvous. Three vittae on the thorax and the elytra are obscure rufo-fuscous with a metallic green reflexion. Each elytron has eight pale fulvous spots.Catalogue of Hispidae in the collection of the British museum
Life history No host plant has been documented for this species.
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