New Data to the Cytology of the Parthenogenetic Weevils of the Genus Otiorrhynchus Germ. (Curculionidae, Coleoptera) from Poland

Examination of chromosome number in 5 parthenogenetic species of the genus Otiorrhynchus Germ. occurring in the mountains chains of Poland, viz. O. salicis Strom., O. scaber L. O. subdentatus Bach., O. pauxillus Rosh., O. proximus Strl. showed polyploidy in all cases. Counts were done in somatic and meiotic divisions. All species but O. scaber are stated as triploid (with 33 chromosomes), the last forming both tri- or tetraploid forms (with ca. 33 or 44 chromosomes).The differentiation in the degree of polyploidy among species occurring in Polish-mountains is smaller than in those of Alps.