Fagaceae, Dumortier, 1829

Hosts. Fagaceae View in CoL View at ENA : Castanopsis cuspidata , * Quercus glauca ( Kawai 1980) .

Remarks. Takagi has commented that it is not easy to determine whether this specimen collected in Korea represents a variation within A. recurrens or a distinct species (Takagi 2011). The morphological differences between the Korean and Japanese forms are usually attributable to host- and feeding-site variations. Japan is separated from the Asian continent, so this geographic isolation may be a critical factor, giving rise to intraspecific diversification of A. recurrens . It is difficult to determine which form is more ancestral. In an effort to clarify this problem, a survey should be conducted from a wider area in Asian continent including China.