M. Holecova et al., CHROMOSOME COMPLEMENT AND MEIOSIS IN 8 BISEXUAL SPECIES OF WEEVIL (CURCULIONIDAE, COLEOPTERA), Folia Biologica, 43(1-2), 1995, pp. 41-49
Karyological investigations were carried our on eight species of bisex
ual weevil belonging to five subfamilies, viz. - Otiorhynchinae, Brach
yderinae, Cleoninae, Hylobiinae, Ceutorhynchinae. The following number
s of chromosomes were found in individual species: 2n=22, n male=10tXy
(p) in Otiorhynchus opulentus Germ., Phyllobius oblongus (L.), Phyllob
ius arborator (Herbst), Rhinomiasforticornis (Boh.), Polydrusus rufico
rnis (Bonsd.); 2n=44, n male=21+Xy(p) in Lixus cardui Ol.; 2n=36, n ma
le=17tXy(p) in Adexius scrobipennis Gyll., and 2n=28, n male=13+Xy(p)
in Nedyus quadrima-culatus (L.). The heterochromosomes of all species
form, in the first meiotic metaphase, a parachute bivalent. The mitose
s were observed and analysed in three species. The karyotype of Nedyus
quadrimaculatus (L.) is constituted by metacentric chromosomes; the k
aryotypes of Phyllobius oblongus (L.) and Rhinomias forticornis (Boh.)
by metacentric and submetacentric ones.