KARYOTYPE AND MORPHOLOGY OF THE LARVAE OF CHIRONOMUS ANTHRACINUS ZETT.
(DIPTERA, CHIRONOMIDAE) FROM EASTERN KAZAKHSTAN
N. A. Petrova,1 A. Rakisheva 2
1 Zoological Institute RAS, and
2 Institute of Zoology, Natiohnal Academy of Sciences, Almaty, Kazakhstan;
e-mail: res@zin.ru
Larval morphology and polytene chromosomes of Chironomus anthracinus from eastern Kazakhstan have been
described. Larvae have no lateral tubules on VII abdominal segment, but have paired ventral tubules on VIII
abdominal segment. 2n = 8 (Al.l Bl.l C2.2 Dl.l El.l Fl.l Gl.l). Two nucleoli are present in arms IVG and
IIIF. Mapping of chromosomes, apart from antC2 arm, was performed after Shobanov (1996). B-chromosomes have been
discovered in this species for the first time (in 19.4 % individuals). Heterozygous inversions occurred in arms
LA and HIE in 46 % of individuals. Compared to C. anthracinus from Yaroslavl Region, differences in
morphology and karyology observed in this species from eastern Kazakhstan are related to habitation of the
population examined in the deep-water Lake Markakol on the boundary of the area range.
Key words: Chironomus anthracinus, Kazakhstan, karyotype, B-chromosomes
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