Sources of the Urban Fauna of Irkutsk Exemplified by the Weevil Family (Coleoptera, Curculionidae)

Data on the occurrence of four weevil species previously not recorded from Irkutsk are given. Their ranges have expanded east- or westwards, probably under anthropogenic influence. Distribution, host plants, and the possible pathways of their expansion into the Baikal region are discussed. The East Palaearctic species Yunakovius orientalis Borovec is recorded for the first time from Transbaikalia.