Marchenko I.I. 2017. [Soil gamasid mites (Acari, Mesostigmata) of Sokhondinskii Nature Reserve, Zabaikalskii Krai, Russia] // Euroasian Entomological Journal. Vol.16. No.2: 151–157 [in Russian, with English summary].
Institute of Systematics and Ecology of Animals, Siberian Branch of the Russian Academy of Sciences, Frunze Str. 11, Novosibirsk 630091 Russia.
ABSTRACT. 55 species of gamasid mites belonging to 27 genera and 16 families (Mesostigmata) were recorded from Sokhondinskii Nature Reserve for the first time. The family Zerconidae is the most biodiverse (13 species from 4 genera), including Zercon and Gamasellus with 8 and 5 species respectively, typical of the taiga belt in the mountains of Southern Siberia. In the mid-altitude and high altitude belts of Sokhondo species of gamasid mites prevail with the East-Palearctic types of areals (63%) whereas the widely distributed species (cosmopolitans, trans-Holarctic and trans-Palaearctic) represent only 37%. The inverse ratio of these areal groups was observed among oribatid mites of Sokhondo (according to the literature): the widely distributed species dominate (65%), and the share of the Asian species is only 35%. Three species of the primitive gamasid genus Halozercon were found, including H. karacholana Wisniewski, Karg et Hirschmann, 1992. Apparently, the areal of the genus Halozercon coincides with the areal of the ancient formation of mountain taiga (with Abies sibirica, Populus tremula, Pinus sibirica), which is considered as a derivative of tertiary nemoral forests in the mountains of Southern Siberia.
KEY WORDS: area, East Palaearctic species, taiga, highlands, derivate of tertiary nemoral forests, mountains of Southern Siberia.