Fig. The map of historical distribution of steppe marmot in Penza region.
A - border of Penza region, B - border of Penza province, 1 - burrow sites (bootans),
2 - archives data (end of 18 c), 3 - inquiry data (end of 19 c), 4 - remainders of
bone, 5 - the last relict colony (1984), 6 - toponyms, 7 - places of release
(1985-89).