A Chromosomal Analysis of Twelve Species of the Subfamily Chrysomelinae (Coleoptera, Chrysomelidae)

Twelve species of chrysomelines, all but one from the Palaearctic region, have been cytogenetically analyzed, mostly through their male meiotic metaphases I. Ambrostoma superbum has 2n = 40 (Xy(p)), Chrysolina colasi, Oreina fairmairiana and the Neotropical Platyphora spectabilis have 2n = 24 (Xy(p)), Chrysolina gebleri 2n = 26 (XY(p)), Colaspidema barbarum 2n = 28 (Xy(p)), Crosita altaica and C. rugulosa 2n = 30 (Xy(p)), Phratora polaris, Ph. vitellinae and Ph. vulgatissima 2n = 34 (Xy(p)), and the karyotype of Chrysolina marginata, consisting of 40 chromosomes, is also described. These results are discussed with those previously obtained in related genera and congeneric species, giving further support and extending the high chromosomal variability so far found in this subfamily of leaf beetles.