Xanthonia angulataXanthonia angulata is a species of leaf beetle. It is found in North America. It is associated with oaks. The specific name comes from the Latin angulatus, meaning "with angles".DistributionX. angulata is distributed from Maryland to Kansas. It has also been recorded from Arkansas, Oklahoma and Texas.DescriptionXanthonia angulata measure in length. The elytra are uniformly medium brown.