O. Merkl szerk.: Folia Entomologica Hungarica 67. (Budapest, 2006)

Diagnosis - Most closely related to Dryocosmus mikoi sp. n. (see diagnosis to D. mikoi sp. n. below). Differs from all other known Western Palaearctic species of Dryocosmus by smooth shiny, unsculptured scutellum and absence of irradiating striae on the lower face and malar space. The only known Palaearctic Dryocosmus species that can lack irradiating striae in the malar space of the head in some specimens is Dryocosmus kuriphilus YASUMATSU, 1951, known as a severe pest of chestnuts, and which was recently introduced to Europe (Italy) (BRUSSINO et al. 2002, 2003). However, the wasp of the latter is entirely black, the scutellum Figs 86-92. Dryocosmus tavakolii sp. n.: 86 = scutum, dorsal view, 87 = scutellum, dorsal view, 88 = mesosoma, lateral view, 89 = metanotum and propodeum, dorsal view, 90 - metasoma, lateral view, 91 = ventral spine of hypopygium, ventral view, 92 = gall with emergence holes (photo by G. MELIKA)