Andricus Hartig, 1840

A large Holarctic genus of approximately 300 described species (Melika & Abrahamson 2002), inducing a great diversity of galls on all tree organs and on numerous oak species from sections Cerris, Quercus, Lobatae and Protobalanus . The genus is represented by 81 species in the Western Palearctic fauna, 28 of which are known from both generations, (Stone et al. 2008). Some species exhibit obligate host alternations between a sexual generation on oaks from section Cerris and an asexual generation on oaks from section Quercus . Curently, 28 species are known from Israel from Q. ithaburensis, Q. boissieri, Q. libani and Q. cerris .