| chromosome studies on primitive chrysomelids. 1. a survey of six species of criocerinae (coleoptera, chrysomelidae). | the chromosome numbers and sex-determining systems of six species of criocerinae have been determined, four of them for the first time. oulema melanopus l., crioceris paracenthesis l., c. asparagi and c. duodecimpunctata l. share a 7ii + xyp formula, while lema puncticollis curt. has 8ii + xyp and lilioceris lilii shows a karyotype of 2n = 20 chromosomes. the modal chromosome formula and possibly the most primitive one for criocerinae is 7ii + xyp, but it should not be assumed as the ancestral f ... | 1980 | 7215000 |