Chromosome complement and meiosis in eight bisexual species of weevil (Curculionidae, Coleoptera)

Publication Type:Journal Article
:1995
Authors:M. Holecova, Rozek, M., Lachowska, D.
Journal:Folia Biologica (Cracow)
Volume:43
Pagination:41-49
Type of Article:Article
:0015-5497
:Adexius scrobipennis, Lixus cardui, Nedyus quadrimaculatus, Otiorhynchus opulentus, Phyllobius arborator, Phyllobius oblongus, Polydrusus ruficornis, Rhinomias forticornis
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Karyological investigations were carried out on eight species of bisexual weevil belonging to five subfamilies, viz. - Otiorhynchinae, Brachyderinae, Cleoninae, Hylobiinae, Ceutorhynchinae. The following numbers of chromosomes were found in individual species: 2n = 22, n male = 10+Xy-p in Otiorhynchus opulentus Germ., Phyllobius oblongus (L), Phyllobius arborator (Herbst), Rhinomias forticornis (Boh.). Polydrusus ruficornis (Bonsd.); 2n = 44, n male = 21+Xy-p in Lixus cardui Ol.; 2n = 36, n male = 17+Xy-p in Adexius scrobipennis Gyll., and 2n = 28, n male = 13+Xy-p in Nedyus auadrimaculatus (L.). The heterochromosomes of all species form, in the first meiotic metaphase, a parachute bivalent. The mitoses were observed and analysed in three species. The karyotype of Nedyus quadrimaculatus (L) is constituted by metacentric chromosomes; the karyotypes of Phyllobius oblongus (L) and Rhinomias forticornis (Boh.) by metacentric and submetacentric ones.

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