Abstract
The ground beetle fauna was studied in 12 biotopes of the tundra belt on Ola Plateau, 130 km NW of Magadan. In all, 16 species were found above timber line (900–1220 m), which is comparable with the diversity in the mountain tundras of the upper reaches of the Kolyma (Berman et al., 1984; Bukhkalo, 1997), but the faunistic similarity of these regions is low (Jaccard’s coefficient 22–29%). Besides the widespread species, a group of ground beetles with limited ranges is present; it includes Carabus kolymensis Lafer, 1989 occurring in the East Siberian mountain tundras, the Siberian-Nearctic, mainly arctic Pterostichus agonus G. Horn, 1880, and the East Siberian Pterostichus eximius A. Mor., 1862. The use of the term “arctic species” in arealogical and ecological studies is discussed.
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