The western U.S. cynipid names I use on this site are those used in Russo 2021 Plant Galls of the Western United States plus a number of scientific papers that have been published since Russo 2021. Where applicable I also include Melika & Abrahamson 2002 names (as does Russo in his book). Cynipid taxonomy for many decades has been a mess. Luckily, recent papers including the following listed below are adding to our knowledge of North American cynipid taxonomy.

Melika, G., J.A. Nicholls, W.G. Abrahamson, E.A. Buss, & G.N. Stone, 2021. New species of Nearctic oak gall wasps (Hymenoptera: Cynipidae, Cynipini) Zootaxa 5084 (1): 001-131

Melika, George, Juli Pujade-Villar, James A Nicholls, Victor Cuesta-Porta, Crystal Cooke-McEwen, Graham N Stone, 2021. Three new Nearctic genera of oak cynipid gall wasps (Hymenoptera: Cynipidae: Cynipini): Burnettweldia Pujade-Villar, Melika & Nicholls, Nichollsiella Melika, Pujade-Villar & Stone, Disholandricus Melika, Pujade-Villar & Nicholls; and re-establishment of the genus Paracraspis Weld Zootaxa 4993(1):1-81

Nieves-Aldrey, Nicholls, Tang, Melika, Stone, Pujade-Villar, Buffington, Maldonado, Medianero, 2021. Re-description and systematic re-appraisal of the genus Kokkocynips Pujade-Villar & Melika, (Hymenoptera: Cynipidae: Cynipini), including new combinations of Nearctic species and the description of a new species from Panama Zootaxa 4938 (2): 205-232

Melika, G. & J. Nicholls, 2021. A new genus of Nearctic oak gall wasp, Grahamstoneia Melika & Nicholls, gen. nov. (Hymenoptera: Cynipidae, Cynipini) Zootaxa 4999 (5): 456-468