Quercus-robur
Guides
Cynips
oak gall wasps
Cynips is a genus of gall wasps comprising approximately 39 species, all associated with oak trees (Quercus spp.). The genus includes the well-known common oak gall wasp (C. quercusfolii), which induces spherical galls on oak leaf undersides. Species in this genus exhibit heterogony, alternating between sexual and asexual generations that typically produce morphologically distinct galls. The genus was established by Linnaeus in 1758 and remains taxonomically stable, though some former members (such as Antron) have been reinstated as separate genera.