Karyotype and COI sequences of Chironomus sokolovae Istomina, Kiknadze et Siirin, 1999 (Diptera,Chironomidae) from the bay of Orkhon River, Mongolia

Chironomus sokolovae Istomina, Kiknadze et Siirin, 1999 (Diptera, Chironomidae) is recorded from Mongolia for the first time. Eleven banding sequences determined in Mongolian population were previously known Altai and Yenisei populations: sokA1, sokB1, sokB2, sokC1, sokC2, sokD1, sokD2, sokE1, sokF1, sokF2 sokG1. The additional B-chromosomes are absent. DNA-barcoding of COI gene was carried out this species phylogenetic tree estimated by Bayesian inference showed a high similarity studied with Ch. acutiventris Wülker, Ryser Scholl, 1983 obtusidens -group. genetic distance K2P between much lower (0.38%) than commonly accepted threshold 3% genus Meigen, 1803. Our results show that cytogenetic criteria level more accordance morphological ones same level, molecular-genetic distance.