Striatoandricus georgei Pujade-Villar, In Pujade-Villar et al. (2011: 28), In Cuesta-Porta et al. (2020a: 12)

Gall (Figs. 7a-b): Found adhered to the central vein on the underside of the leaves (rarely on the upper side). It appears as a mass of lemon yellow wool (sometimes dirty yellow, never brown), with brittle but not fragile pubescence, 1.0-1.6 cm in diameter, circular in appearance (rarely oval). The pubescence is located above the central core, forming a layer 3-4 mm thick. The central core is spherical, yellowish, dense and hard, and multilocular; the larval chambers are slightly ovoid (1x1.1 mm).

Hosts: Quercus deserticola, Q. glabrescens × obtusata, Quercus glaucoides M. Martens and Galeotti, 1843, Q. laeta, Q. magnoliifolia, Q. resinosa, and Q. rugosa (section Quercus).

Biology: The whitish galls form from September and mature in December. Adults emerge from December to April.

Distribution: Mexico (Mexico City, Hidalgo, Jalisco, Morelos, Puebla, and Zacatecas); cited from Santa Fe in Cuesta-Porta et al. (2020) on Q. rugosa and Q. laeta.

Stiatoandricus [sic] georgei n. comb.

Andricus georgei

[No gall description given]

Hosts: In Quercus, section Quercus: Q. deserticola Trel., Q. glabrescens × obtusata, Q. glaucoides M. Martens and Galeotti, Q. laeta Liebm., Q. magnoliifolia Née, Q. resinosa Née and Q. rugosa Née (Quercus section); after a reexamen of host by S. Valencia-A, the host mentioned in Pujade-Villar et al. (2011, Q. mexicana Humb. and Bonpl.) is wrong, the correct host is Q. deserticola Trel. All host are new records from this species.

Distribution: México, described from material collected in the Parque Nacional del Bosque del Pedregal (Bosque de Tlalpan, Ciudad de México). Its distribution is extended to have collected it in the states of Hidalgo, Jalisco, Michioacan, Morelos, Puebla and Zacatecas.

Andricus georgei Pujade-Villar n. sp.
[original translation by Adam Kranz]

The material has been collected in the Bosque del Pedregal National Park (Bosque de Tlalpan, Mexico D.F.; 19°17'27", 72’’N, 99°11'59", 31"W; 2.440 m) on Quercus mexicana [a mistake; should be deserticola].

Gall. (Fig 3). Found adhered to the midrib on the lower side of the leaf. It appears as a mass of lemon yellow wool, or sometimes dirty yellow, never brown), with hair that is brittle without being fragile, from 1 to 1.6 cm in diameter, circular or rarely oval in shape. The pubescence is located above the central nucleus forming a 3-4 mm thick layer. The polythalamous core, yellow in color, is dense and hard, without separating the larval chambers, which are slightly ovoid (1 x 1.1 mm).

Diagnosis: A mexicanus [nievesaldreyi] differs in the size of the galls (larger in A. mexicanus), the appearance of the galls (never brown in the new species), and the location of the galls (on the top of the leaves in A. mexicanus).

Host. Q. mexicana Humb. & Bonpl. (subgen. Quercus, section Lobatae) [a mistake; should be deserticola].

Distribution: Collected in the Forest of Tlalpan in the DF, Mexico