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Karyotype and  COI  gene sequences of    Chironomus   melanotus    Keyl, 1961 from the Yaroslavl region (Russia) were analyzed. A low level of chromosomal polymorphism has been confirmed, eventually eight banding sequences were found: melA1, melB1, melC1, melD1, melE1, melF1, and melG1; only melD2 was found in two larvae from the Sunoga river. Analysis of phylogenetic tree and estimated genetic distances has shown not all  COI  gene sequences of    Ch.   melanotus    in GenBank and  BOLD  to belong to this species. The lower distance of 0.4% was observed between two sequences from the Yaroslavl region and Finland, apparently these are true    Ch.   melanotus    sequences. The distances between true    Ch.   melanotus    and other sequences from Finland were 9.5% and 12.4%, and from Sweden it was 11%. The average genetic distance between studied sequences of 9.1% is out of the range of the 3% threshold previously determined for chironomids. According to our estimates, there are two sequences with a distance of 2.9% that may belong to    Ch.   annularius    Meigen, 1818, and one sequence with a genetic distance of 2.1%, may belonging to    Ch.   cingulatus    Meigen, 1830, which has been confirmed karyologically. Another two sequences form a separate cluster. We suggest that they either belong to a known species, but are not present in the databases, or belong to a distinct, undescribed species.

comparative cytogenetics

﻿Karyotype and COI gene sequences of    Chironomus   melanotus    Keyl, 1961 from the Yaroslavl region, Russia, and the difficulties with its identification using GenBank and BOLD systems

﻿Karyotype and COI gene sequences of Chironomus melanotus Keyl, 1961 from the Yaroslavl region, Russia, and the difficulties with its identification using GenBank and BOLD systems

Karyotype and COI gene sequences of Chironomus melanotus Keyl, 1961 from the Yaroslavl region, Russia, and the difficulties with its identification using GenBank and BOLD systems