Bur-oak
Guides
Acraspis villosa
Acraspis villosa is a gall-forming wasp in the family Cynipidae. It induces galls on bur oak (Quercus macrocarpa). The species has been documented in Canada and the United States. Molecular studies have confirmed alternate sexual and asexual generations using DNA sequencing of cytb and ITS2 markers.
Bassettia flavipes
Bassettia flavipes is a gall wasp in the family Cynipidae that induces galls on oaks, particularly Quercus macrocarpa (bur oak). This species exhibits an alternation of generations between sexual and asexual forms, a trait now confirmed through molecular data. It was originally described from the sexual generation by Gillette in 1889 and was later transferred from the genus Neuroterus to Bassettia based on genetic and morphological evidence. The species is distributed across the northern United States and southern Canada.