Striatoandricus guatemalensis (Cameron, 1883), comb. nov.

Cynips guatemalensis Cameron, 1883: 71, gall.
Andricus guatemalensis (Cameron) Ritchie & Shorthouse, 1987: 240.
Synergus dorsalis Cameron, 1972: 72.
Andricus dorsalis (Cameron): Ritchie & Shorthouse, 1987: 240.

Galls. Densely hairy hemispherical masses attached to the midrib of the underside of the leaves. The center is hard and woody, and the fibers radiate from the center towards the edge; the larval chambers are situated along the edge, there being none in the center. Outside the woody central gall is a covering of woolly hairs, white basally, but reddish brown distally. The galls are usually found in pairs, occasionally singly.

Biology. Only an asexual generation is known, inducing galls on Quercus sp. [Quercus peduncularis added as a plausible placeholder]

Distribution. Guatemala: San Jerónimo (Baja Verapaz)

Comments. Cameron (1883) described Cynips guatemalensis based exclusively on gall samples, however the drawings of the galls in the same study were morphologically discordant from his description in the text. This problem has been solved recently by Pujade-Villar et al. (2022). Furthermore, Synergus dorsalis Cameron was described in the same study (Cameron 1883); the type material of which (“Synergus” adult) was examined by Richie & Shorthouse (1987) who concluded that it corresponds to an Andricus. Cameron mentions that S. dorsalis was obtained from the gall of Cynips guatemalensis, therefore S. dorsalis, currently Andricus dorsalis (Cameron), is the inducer of the gall of C. guatemalensis (currently Andricus guatemalensis).

- Victor Cuesta-Porta, George Melika, James Nicholls, Graham Stone, Juli Pujade-Villar: (2022) Re-establishment of the Nearctic oak cynipid gall wasp genus Druon Kinsey, 1937 (Hymenoptera: Cynipidae: Cynipini), with description of five new species^©