New data on the systematics, distribution, and ecology of weevils of the Otiorhynchus morosus Fst. Group (Coleoptera, Curculionidae)

Results of investigation of the Otiorhynchus subgenus Nubidanus Rtt. (sensu Reitter) are reported. Pseudotiorhynchus Magnano is downgraded to a subgenus of Otiorhynchus Germar. Four species-groups are distinguished in the subgenera Nubidanus (as recently treated) (the hebraeus and impexus groups) and Pseudotiorhynchus (the morosus and ruminalis groups). Morphological diagnoses and brief distributional characteristics of the groups are given. Lectotype of O. morosus is designated, four new species closely related to O. morosus are described from Middle Asia and Kazakhstan.