Nicholls, J. A., Stone, G. N., & Melika, G. (2018). A new genus of oak gallwasp, Protobalandricus Melika, Nicholls & Stone (Hymenoptera: Cynipidae: Cynipini) from California. Zootaxa, 4472(1), 141–152. https://doi.org/10.11646/zootaxa.4472.1.7