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

中文翻译：

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蒙古鄂尔罕河湾的奇异虫Chitomomus sokolovae Istomina的核型和COI序列，Kiknadze et Siirin，1999年（Diptera，Chironomidae）

蒙古首次记录了Chironomus sokolovae Istomina，Kiknadze et Siirin，1999年（Diptera，Chironomidae）。以前从阿尔泰和叶尼塞族中知道了在蒙古族中确定的11个条带化序列：sokA1，sokB1，sokB2，sokC1，sokC2，sokD1，sokD2，sokE1，sokF1，sokF2和sokG1。不存在其他B染色体。首次对该物种进行了COI基因的DNA条形码编码。由贝叶斯推断估算的系统进化树显示，与Ch。acutiventrisWülker，Ryser et Scholl，1983年，钝齿百日草小组。Ch。之间的估计遗传距离K2P。索科洛娃和Ch。相较于1803年的美罗氏中华Chi（Chironomus Meigen）物种的3％普遍接受的阈值，刺梨（acutiventris）要低得多（0.38％）。