Galls in which the larvae live and feed are formed in clusters along the midrib on the underside of oak leaves.

[1][2][3] Confirmed hosts of the clustered midrib gall wasp are white oak species, including Quercus macrocarpa, Q. alba, Q. prinoides, and Q.

[1][2] Clusters of up to 50 globular (but with a pointed base), red-brown galls are formed along the midrib on the underside of leaves beginning in late summer.

[2] According to Clarence Gillette, William Ashmead had already used this name by 1889 for a species that produces galls similar to those of Beutenmuller's Cynips dimorphus.

[5] This species was later transferred to the genus Adleria which itself was subsequently included within Andricus.