A partial synonymy for the gall. Philonix nigra remains a valid species but it's not clear what it refers to--apparently an adult that is not associated with a gall?

Nicholls, James A., et al. "Pairing of sexual and asexual generations of Nearctic oak gallwasps, with new synonyms and new species names (Hymenoptera: Cynipidae, Cynipini)." Zootaxa (2022).