Scolytus ratzeburgii Janson, 1856

Distribution in Iran. Iran (no locality cited) (Knížek 2011).

General distribution. Central and northern Europe, through central and northern Asia to China, Korea, Japan.

Biology. The species breeds in species of Betula (Betulaceae) . It has occasionally been recorded from Ulmus (Ulmaceae) . The biology and gallery system are described by Palm (1959) and Michalski (1973). Although normally breeding in dead and dying birch, when an outbreak occurs, the species is able to attack and kill healthy trees (Palm 1959), and the species has some economic importance in the birch forests of northern Asia (Yanovskij 1999).