Synergus mexicanus Gillette, 1896

Lobato-Vila, Irene & Pujade-Villar, Juli, 2021, The genus Synergus Hartig (Hymenoptera: Cynipidae: Synergini) in the New World: a complete taxonomic revision with a key to species, Zootaxa 4906 (1), pp. 1-121 : 67

Synergus mexicanus Gillette, 1896

Synergus mexicana Gillette, 1896 . Trans. Am. Entomol. Soc. 23: 96. Type material: USNM.

Synergus dugesi Ashmead, 1899 . Ent. News 10: 195. Type material: USNM. Synonymized by Pujade-Villar & Lobato-Vila (2016a: 76).

Synergus multiplicatus Fullaway, 1911 . Ann. Entomol. Soc. Am. 4: 370. Type material: CAS (lectotype), paralectotypes in CAS and USNM. Synonymized by Lobato-Vila et al. (2019: 231).

Saphonecrus brevis Weld, 1926 . Proc. U. S. Nat. Mus. 68: 109. Type material: USNM (holotype), paratypes in USNM, AMNH, CAS, MCZ, Field Museum and Philadelphia Academy, according to the original description.

Synophrus mexicanus: Weld (1952) . Proc. U. S. Nat. Mus. 102 (3304): 316.

Synergus mexicanus: Pujade-Villar & Melika (2005) . Boletín Sociedad Entomológica Aragonesa 37: 217 [status verified].

Synergus brevis: Schwéger et al. (2015b) . Zootaxa 4054 (1): 62. Synonymized by Pujade-Villar & Lobato-Vila (2016b: 64).

Diagnosis. See Lobato-Vila et al. (2019: 233).

Distribution. USA: Arizona, California, and New Mexico; and Mexico: Ciudad de México, Guanajuato, Hidalgo, México, and Zacatecas ( Gillette 1896; Ashmead 1899; Fullaway 1911; McCracken & Egbert 1922; Weld 1926; Pujade-Villar et al. 2015b; Pujade-Villar & Lobato-Vila 2016a, 2016b; Lobato-Vila et al. 2019).

Biology. Reared from tuberous galls and fusiform swellings induced by different Andricus species on twigs of oaks from both Quercus and Lobatae sections ( Ashmead 1899; Fullaway 1911; McCracken & Egbert 1922; Weld 1926; Pujade-Villar et al. 2015b; Pujade-Villar & Lobato-Vila 2016a, 2016b; Lobato-Vila et al. 2019).

Remarks. The type material of Synergus mexicanus was examined and the species was redescribed and illustrated by Pujade-Villar & Melika (2005: 217). The redescription was later improved by Pujade-Villar et al. (2015b: 147). Synergus mexicanus was also treated by Pujade-Villar & Lobato-Vila (2016a, 2016b) and Lobato-Vila et al. (2019: 231).