Disholcaspis prehensa Weld, 1957, sexual generation

[A photo of this gall appears on page 17 of the pdf]

Gall (Fig. 35): Length 2.2–3.5mm, buff to light brown colored, oblong grain-shaped, bluntly or sharply pointed, thin walled, and glabrous. Arising from the buds at the base of new leaves and flowers when they flush in the spring. Emergence holes are rough edged and near the apex.

Host plant remarks: Quercus dumosa is the host plant listed in the original description of D. prehensa (Weld 1957). However, the name Q. dumosa has been applied to almost all species of scrub oak in central and southern California. Asexual generation D. prehensa have also been photo-documented (Gross J. 2007 and 2012) and reared from Q. berberidifolia (listed as host for specimen D_prehensa_Dispre3). The host plant voucher for the sexual generation specimens USNMENT00961761, USNMENT00961924, and USNMENT00961763 is deposited at MARY and identified as Q. berberidifolia. This shows that the sexual generation of D. prehensa is found on the same host species as the asexual generation.

- Crystal Cooke-McEwen, Michael Gates: (2020) Contributions to Disholcaspis Dalla Torre And Kieffer (Hymenoptera: Cynipidae: Cynipini)^©