From above, these galls resemble the upper side of galls of Polystepha pilulae, particularly those with irregularly confluent rather than near-spherical structure. However, they differ in being found only in vein angles, in having a darker, almost black surface, and in having an enlarged hairy domatia on the lower side rather than a smooth callus. Observed in Florida in September.

A similar gall has been observed on the lower side of Quercus shumardii vein angles. Polystepha podagrae is known to make slightly smaller galls on veins and angles of Quercus ilicifolia and velutina.