Dryocosmus Giraud, 1859

A Holarctic genus of 29 species, inducing leaf, twig, shoot and bud galls on oaks from sections Cerris; Castanea, and Chrysolepis . Most species are known from both generations. Adults resemble those of Chilaspis but differ from them in certain morphological characters. This is a paraphyletic genus, with seven species in the Western Palaearctic (Cerasa et al. 2018) and many species in the Eastern Palaearctic (Tang et al. 2016a) and the Nearctic Regions (Melika & Abrahamson 2002). Two species are known from Israel on Q. ithaburensis .