These circular, integral blister galls project slightly above and below the lamina of Quercus virginiana leaves. The galls contain a single midge larva tentatively associated with the genus Polystepha based on affinity with other Polystepha galls on oaks. The inducer apparently exits the gall through a relatively large hole opened on the upper side of the leaf. The galls sometimes but not always occur in large numbers, nearly covering a host leaf. Galls that appear fresh but have exit holes or live larvae have been observed from February to July, on both initial and second-flush growth, indicating the species has multiple generations each year.

This gall was initially mistaken for Neuroterus christi, which forms more irregularly shaped galls without prominent exit holes above.

Observations of this gall are collected in this Similar Observation Set on iNaturalist.

A similar gall was observed on Quercus fusiformis in Texas in July.

A similar gall was observed on Quercus minima in Florida in July.

- Gallformers Contributors: (2024) Gallformers ID Notes^©