Marmota sibirica (Radde, 1862) . Reise in den Süden von Ost-Sibierien, p. 159.

TYPE LOCALITY: "Kulusutai, near Lake Torei-Nor, southeast Transbaikal" [Chitinsk Obi., Russia] .

DISTRIBUTION: SW Siberia, Tuva, Transbaikalia (Russia); N and W Mongolia; Heilungjiang and Inner Mongolia (China).

SYNONYMS: caliginosus Bannikov and Skalon, 1949; dahurica (Dybowski, 1922).

COMMENTS: Placed (with baibacina) in bobak (Ellerman and Morrison-Scott, 1951:515; Corbet, 1978c:81). Gromov et al. (1965) and Zimina (1978) provided evidence of specific distinctness and included caliginosus in this species; see comment under baibacina . Nikol'skii (1974) and Smirin et al. (1985) analyzed contact between baibacina and sibirica in Tuva and the Mongolian Altai; Sokolov and Orlov (1980:329) also indicated sympatry in NW Mongolia; limited hybridization is possible.