Sinev Artem Y, Karabanov Dmitry P, Kotov Alexey A
A. N. Severtsov Institute of Ecology and Evolution, Leninsky Prospect 33, Moscow 119071, Russia. Department of Invertebrate Zoology, Biological Faculty, M.V. Lomonosov Moscow State University, Leninskie Gory, Moscow 119991, Russia..
Zootaxa. 2020 Apr 23;4767(1):zootaxa.4767.1.5. doi: 10.11646/zootaxa.4767.1.5.
Our analysis of Alona cf. affinis (Cladocera: Chydoridae) populations from European Russia, Siberia and Far East of Russia bearing denticles at the posteroventral corner, based on both their morphology and genetic study considering variability of mitochondrial COI and 16S and nuclear 18S genes, revealed that they belong to a separate taxon described here as Alona sibirica sp. nov. Previously populations with denticles at the posteroventral corner were recorded from Sweden, Finland, Ukraine, European Russia, Kyrgyzstan and Mongolia, but never reported outside the temperate regions of Eurasia, so A. sibirica sp. nov. is presumably the only species of the A. affinis group with denticles at the posteroventral corner of the valves. The primary distribution area of the new species is North-East Palaearctic, while Eastern Europe and Central Asia are the areas of the species penetration, where it is less common and frequently coexisting with A. affinis s. str.
我们对来自俄罗斯欧洲部分、西伯利亚和俄罗斯远东地区的近缘阿氏象鼻溞（枝角亚目：盘肠溞科）种群进行了分析，这些种群在腹后侧角有小齿，基于其形态学以及考虑线粒体COI和16S以及核18S基因变异性的遗传学研究，结果表明它们属于一个单独的分类单元，在此描述为新物种西伯利亚阿氏象鼻溞。此前在瑞典、芬兰、乌克兰、俄罗斯欧洲部分、吉尔吉斯斯坦和蒙古记录到了在腹后侧角有小齿的种群，但在欧亚大陆温带地区以外从未有过报道，所以西伯利亚阿氏象鼻溞可能是阿氏象鼻溞类群中唯一在瓣膜腹后侧角有小齿的物种。新物种的主要分布区域是东北古北区，而东欧和中亚是该物种的渗透区域，在那里它不太常见，且经常与阿氏象鼻溞指名亚种共存。
