Zapatella polytryposa Pujade-Villar y Fermández-Garzón, In Pujade-Villar et al. (2020: 12)

Gall (Figs. 7e-f): The long galls are on branches over a year old. They are inconspicuous until the emergence of the adults, at which point the emergence holes can be observed. The larval chambers are oval (2 x 3 mm), deeply embedded in the xylem, contiguous, and numerous; hundreds of elongated larval cells that can occupy more than 60 cm of the branch's length.

Hosts: Quercus crassipes (section Lobatae).

Biology: It is unknown when the galls begin to form, but larvae are found from September to April. Adults emerge from late April to early May.

Distribution: Only known from Santa Fe (Mexico City).

Comments: The recently described species, Z. polytryposa, was considered damaging to Q. crassipes in southwestern Mexico City from the time of its description. Shortly after the emergence of the adults, the branch degrades and the larval chambers can be observed (Fig. 7f). The attacked branches dry up and die. On the same host, a sexual form from acorns was obtained in the same study area that is yet to be described; both forms are probably related.

- 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)^©