Phylloteras poculum (Osten Sacken, 1862), sexual generation
Material examined: Five males and five females of the sexual generation, labelled as “CANADA: Alberta, Edmonton, Brennan Crescent, 53.51746°N, -113.682957°W, Google Maps, bud/shoot/ament galls collected 21.v.2018 ex Quercus macrocarpa, S. Digweed, reared 24-30.v.2018”
Gall. Sexual galls (Fig. 225) are exposed, thin-walled, seed-like, ovoid, brown chambers in buds, catkins, and proximal regions of immature leaf midribs and laminae. Sometimes with a sparse pubescence of fibrous, tan hairs; sometimes these hairs are more abundant as a distal tuft. Adults emerge through holes chewed in the distal half of galls. Aging galls can persist on buds and leaves into autumn.
Biology. Galls of the sexual generation became apparent in early May in Edmonton, with adults emerging from mid-May through mid-June. This species has not been previously recorded from Q. macrocarpa; earlier records are from Q. alba and Q. montana. Another congeneric species, Phylloteras volutellae (Ashmead, 1897), is also found on Q. macrocarpa.
Distribution. USA: Virginia, New York, Vermont, New Hampshire, Illinois, Missouri (Burks 1979). Canada: Manitoba, Alberta.
”- James Nicholls, George Melika, Scott Digweed, Graham Stone: (2022) Pairing of sexual and asexual generations of Nearctic oak gallwasps, with new synonyms and new species names (Hymenoptera: Cynipidae, Cynipini)©