Belonocnema fossoria [not a formal synonym per Zhang but Weld uses this name to cover leaf galls of this genus on both Quercus virginiana and geminata. The former is B treatae.]

Quercus virginiana, geminata
Leaf galls, detachable
Tan, smooth, globular galls on under side of leaf in numbers in the fall.

[Photo caption]
Fig 230. On Q virginiana. Also on Q geminata. Adults emerged 8-13. In two cases where the galls were numerous on the leaves in the fall shriveled old galls of Belonocnema treatae Mayr were found on the roots.

Belonocnema treatae (Mayr, 1881)

Dryorhizoxenus floridanus Ashmead, 1881

Host plant: Quercus virginiana and (rarely) geminata

Gall: Smooth, pea-like galls (4.92–5.50 mm) on the ventral side of leaves

Distribution: AL, FL, GA, MS, NC, SC