title: Cytogenetic investigations on seven Palaearctic weevil species (Coleoptera, Curculionidae).
abstract: Cytogenetic investigations were carried out on seven species of bisexual weevils from five subfamilies. The following numbers of chromosomes were found in individual species: 2n = 22, n male = 10 + Xyp in Ptochus porcellus Boh. (Otiorhynchinae); 2n = 40, n male = 19 + Xyp in Larinodontes turbinatus Gyll. (Cleoninae); 2n = 26, n male = 12 + Xyp in Curculio pellitus (Boh.) (Curculioninae); 2n = 30, n male = 14 + Xyp in Acalles camelus (F.), Acalles echinatus (Germ.), Acalles hypocrita Boh. (Cryptorhynchinae), and 2n = 40, n male = 19 + Xyp in Cionus hortulanus (Foucr.) (Mecininae). The heterochromosomes of all the examined species form, in the first meiotic metaphase, a parachute bivalent. The chromosome number and sex determining system of six species and two genera are described for the first time.
authors.affiliation: Department of Experimental Zoology, Institute of Systematics and Evolution of Animals, Polish Academy of Sciences, Sławkowska 17, 31-016 Kraków, Poland. lachowska@isez.pan.krakow.pl
authors.forename: D
authors.initials: D
authors.lastname: Lachowska
authors.forename: M
authors.initials: M
authors.lastname: Rozek
authors.forename: M
authors.initials: M
authors.lastname: Holecová
authors.forename: G
authors.initials: G
authors.lastname: Karagyan
mesh_terms: D000818:Animals; D001517:Coleoptera / Q000166:cytology / Q000235:genetics* / Q000502:physiology; D005260:Female; D007621:Karyotyping; D008297:Male; D008540:Meiosis; D012730:Sex Chromosomes / Q000235:genetics; D019849:Sex Determination Processes