Erebia rossi Curtis in Ross, 1834.
In the Altai Mountains this is, perhaps, the most highland species, not as reaching the highest altitudes (these are Parnassius phoebus and Aporia crataegi who does this) but having the highest lower limit of about 2300 m above sea level. It flies among large stoned screes and moraines of the stepped back glaciers.
Range: Polar regions of Eurasia from the Pechora River to Chukotka, the mountains of the temperate Eurasia south to Mongolia and N Korea, the northern North America.
Ssp.: erda Sheljuzhko, 1924: range: the Altai Mts.
A male
A large-stone scree at 2400 m above sea level on a northern slope of the mountain with the Skynchak cliff at, the Tekelyu River right bank, the Akkem River basin, the Katunskii Range northern principal slope, Central [Russian} Altai Mts., Ust'-Koksa District, Altai Republic, West Siberia, Russia. 1st July 2007. O. Kosterin.