[2] Belonocnema treatae was first described in 1881 by Gustav Leopold Mayr on the basis of sexual generation adults collected by noted naturalist Mary Treat.

[3] Later that same year, William Harris Ashmead described individuals from the same galls as Dryorhizoxenus floridanus, but later synonymized this name under Mayr's B. treatae in 1886.

[1] The asexual generation galls are smooth, unilocular balls that appear on the ventral side of leaves.

[1] The distribution of Belonocnema treatae generally follows that of its main host plant, Quercus virginiana.

However, a species turnover occurs in southeast Mississippi, where B. kinseyi replaces B. treatae for the remaining western range of Q.