FIGURES 10-19 - uploaded by Oksana Orel
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Pupa of C. acidophilus Keyl. 10-11-frontal tubules, dorsal view; 12-median hooks on the posterior margin of tergite II, lateral view; 13-tergites II-VI; 14-tergites VII-IX; 15-19-variability of anal combs. Scale bar 50 µm.
Source publication
Morphology, cytology, ecology and biology of Holarctic Chironomus (Chironomus) acidophilus Keyl, 1960 (Diptera, Chironomidae) was examined from material collected in the geothermal Vosmerka Lake (pH=2.0-2.5). An illustrated redescription of C. acidophilus is given on the basis of adult males reared from field-collected pupae, and of simultaneously...
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The larva, pupa, adults, and karyotype of Chironomus inquinatus sp. n. are described. This species lives in polluted streams in southeastern Brazil and belongs to the pseudothummi cytocomplex, with chromosome arm combinations AE, BF, CD, and G.
The larva, pupa, adults, and karyotype of Chironomus inquinatus sp. n. are described. This species lives in polluted streams in southeastern Brazil and belongs to the pseudothummi cytocomplex, with chromosome arm combinations AE, BF, CD, and G.
Chironomids can inhabit a large variety of water bodies. They contribute to the process of biological purification of water bodies, and they are a high-quality food for commercial fish. Any comprehensive study of biodiversity in water bodies begins with the investigation of chironomids, which are typically variable and difficult to identify through...
Species Chironomus sp. prope agilis Kiknadze, Siirin, Filippova et al., 1991 belongs to the Ch. plumosus group of sibling species. It was described on the basis of its karyotype and analysis of isozymes from one population in the Urals but since then no quantitative data on chromosomal polymorphism of this species have been published. The goal of t...
Quantitative and qualitative analysis of chromosomal polymorphism in 19 natural populations of Ch. agilis had been performed. Most studied populations showed a medium level of chromosomal polymorphism: on average 45±3.0% of specimens are heterozygotes with 0.52±0.01 heterozygotic inversion per larvae. Besides inversions, B-chromosomes were found in...
Citations
Sixty three species from the genus Chironomus were identified on a larvae stage by studying their karyotypes. Morphological analysis of their larvae allowed us to conduct species identification only for a part of studied larvae and was especially unreliable for the larvae of species belonging to sibling species groups. Most of studied chironomids species have wide areal so the species identification was performed for each population from different geographic locations (Western and Eastern Europe, Western and Eastern Siberia, Far East), which allowed us to evaluate geographical variations in their karyotypes. As a rule, species from the genus Chironomus have high level of chromosomal (mostly inversion) polymorphism. Because of that banding sequence pools of most species have more than 7 banding sequences that would be in accordance with the number of chromosomal arms. The number of banding sequences can range from 7 to 60 in species banding sequence pools. Clear geographic differences in spectrum and frequencies of banding sequences had been found between European and Asian populations of many species studied. The greatest differences had been observed between Palearctic and Nearctic population of Holarctic species.
