Weevils of the Genus Ceutorhynchus Germ. (Coleoptera, Curculionidae), Associated with Woodland Draba, Draba nemorosa L. (Brassicaceae), in the South of Eastern Siberia

Seven species from 5 groups of the weevil genus Ceutorhynchus Germ, have been found on a spring and early summer ruderal ephemeral crucifer, woodland draba (Draba nemorosa L.), in the southern regions of Eastern Siberia. Three species (C kipchak Kor, C. ? unguicularis Thorns., and C. klementzorum Kor.) have been found only on this species (the latter two also on the closely related Draba sibirica (Pall.) Thell.). Ceutorhynchu cochleariae Gyll. occurs on the woodland draba at the eastern, and C. dauricus Kor, at the western border of their ranges and both have other crucifers as main hosts; the Holarctic C. querceti Gyll. feeds on D. nemorosa (or on D. sibirica) in the areas where its main host does not occur, and the Dauro-Mongolian C. seniculus C. Bris. develops on many other crucifers besides the draba. Draba nemorosa is the first known host of the Dauro-Mongolian C. klementzorum.