Dryocosmus

Dryocosmus are a genus of gall wasps. They are cyclically parthenogenetic insects that induce galls on plants in the family Fagaceae.

According to recent studies, the genus includes some species previously considered as belonging to the genus Chilaspis, whereas Dryocosmus favus should be excluded of the genus. Dryocosmus and Chilaspis are closely related to the other oak gall wasp taxa (Aphelonyx, Plagiotrochus, Pseudoneuroterus, Trichagalma, and some Neuroterus species)

Dryocosmus kuriphilus is an invasive species in Europe and North America (originating from Asia) that endangers the chestnut trees.

Species

 * Dryocosmus archboldi Melika & Abrahamson, 2021
 * Dryocosmus asymmetricus (split twig gall wasp)
 * Dryocosmus castanopsidis (Chinquapin flower gall wasp)
 * Dryocosmus caspiensis
 * Dryocosmus cerriphilus
 * Dryocosmus deciduus
 * Dryocosmus dubiosus (two-horned gall wasp)
 * Dryocosmus floridensis
 * Dryocosmus imbricariae (banded bullet gall wasp)
 * Dryocosmus israeli
 * Dryocosmus jungalii
 * Dryocosmus kuriphilus Yasumatsu, 1951
 * Dryocosmus mayri
 * Dryocosmus mikoi
 * Dryocosmus minusculus (pumpkin gall wasp)
 * Dryocosmus nervosus
 * Dryocosmus nitidus
 * Dryocosmus quercuspalustris (Osten Sacken, 1861) (succulent oak gall wasp)
 * Dryocosmus rileyi