Andricus sphaericus Pujade-Villar, 2016
Andricus sphaericus Pujade-Villar, In Pujade-Villar et al.
(2016d: 16)

Gall (Figs. 4e-g). The formation of this gall results from swelling of the central and/or secondary leaf veins. Occasionally, the leaf almost entirely disappears. The gall is globular (0.7-1.6 mm in diameter), plurilocular, and hard, with a central navel on top that may disappear when the gall is large. It is light green when young and dark green to black when mature. The surface has light brown, star-shaped trichomes. The gall contains 5-15 larval chambers, measuring 3x1 mm, distributed radially and separated by hard, woody tissue.

Hosts. Quercus deserticola Trelease, 1924, Quercus glabrescens Bentham, 1840, Q. laeta, Q. obtusata and Q. rugosa (Quercus section).

Biology. Only the sexual form is known. Adults emerge from late May to mid-July.

Distribution. Reported for Mexico City (including Santa Fe on Q. rugosa), as well as for the State of Mexico, Nuevo León, and Puebla (Pujade-Villar et al. 2016a; Lobato-Vila and Pujade-Villar 2019).

- Uriel Barrera-Ruiz, Victor Cuesta-Porta, David Cibrian-Tovar, Aitor Martinez-Romero, Juli Pujade-Villar: (2021) Avispas agalladoras de los encinos de Santa Fe (Ciudad de México, México) (Hymenoptera, Cynipidae: Cynipini; Fagaceae)^©