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In the arboretum of the Botanical Garden of Immanuel Kant Baltic Federal University (Kaliningrad, Russia)
12 aphid species inhabiting trees and shrubs were recorded. In Kaliningrad province, there is an eastern border of
the distribution range of Tuberculatus neglectus (Krzywiec, 1966), which inhabits sessile oak (Quercus petraea
(Matt.) Liebl.). Among aphids recorded in 1995, the alien species to this region of Central Europe, which are
commonly found at present, were total absent.