C-banding karyotype and NORs analyse in eight species of Barypeithes Duval from Central Europe (Coleoptera, Curculionidae, Entiminae).
Karyotypes of eight species belonging to the genus Barypeithes were studied using standard Giemsa staining, AgNOR- and C-banding techniques. The species studied share almost the same chromosome number 2n=22 (10+XyP) with exception, of endemic. Barypeithes liptoviensis which possesses. 26 chromosomes (12+XyP). The karyotype of Barypeithes pellucidus is characterized by the presence of one to six B chromosomes clearly distinguishable from the regular members of the complement. In all examined species heterochromatin visualized by C-banding, is found to be limited almost to the pericentromeric region of all chromosomes with differences in their amount. The wide C-bands visible during mitotic metaphase are observed in five species whereas a small blocks of heterochromatin visible during mitotic prophase are found in three species. Also the one Ag-stained NOR situated in the sex chromosomes is visible during mitotic and meiotic prophases.