New geographical localities of chromosome forms of southern birch mouse (subtilis group) and description of Sicista severtzovi cimlanica subsp n. (Mammalia, Rodentia) from the middle Don River basin
Ym. Koval'Skaya et al., New geographical localities of chromosome forms of southern birch mouse (subtilis group) and description of Sicista severtzovi cimlanica subsp n. (Mammalia, Rodentia) from the middle Don River basin, ZOOL ZH, 79(8), 2000, pp. 954-964
The chromosome sets were investigated in 12 individuals of the southern bir
ch mouse (Sicista genus) group sibtilis from the following geographical poi
nts: near Boguchar (southern Voronezh Region) - 1 male, 2n = 18, NF = 28; i
n Kalach sands (Volgograd Region) - 1 female, 2n = 2, NF = 44; on the right
bank of the Medveditsa river (Volgograd Region)- 1 female, 2n = 26, NF = 4
6; and in Tsimlyansk sands (Rostov Region) - 5 males, 4 females, 2n = 22, N
F = 35-36. The specimen from Boguchar was identified as S. severtzovi, that
from Kalach sands as S. subtilis, the birch mices from the Medveditsa rive
r basin and Tsimlayansk sands are new, previously unknown chromosome forms
of the group subtilis. The 22-chromosome form from Tsimlayansk sands are su
ggested to be considered as a new subspecies Sicista severtzovi cimlanica.
An attempt has been made to describe a pattern of distribution 5 forms of t
he group subtilis from the East-European Plain.