Sorex (Sorex) tundrensis Merriam 1900 Sorex (Sorex) tundrensis Merriam 1900, Proc. Wash. Acad. Sci., 2: 16. Type Locality: USA, Alaska, St. Michaels. Vernacular Names: Tundra Shrew. Synonyms: Sorex (Sorex) amasari Ognev 1922; Sorex (Sorex) amazari Ognev 1928; Sorex (Sorex) baikalensis Ognev 1913; Sorex (Sorex) borealis Kastchenko 1905; Sorex (Sorex) centralis Thomas 1911; Sorex (Sorex) irkutensis Ognev 1933; Sorex (Sorex) jenissejensis Dudelski 1930; Sorex (Sorex) khankae Baranova and Zaitsev 2003; Sorex (Sorex) margarita Fetisov 1950; Sorex (Sorex) middendorfii Ognev 1933; Sorex (Sorex) parvicaudatus Okhotina 1976; Sorex (Sorex) petschorae Ognev 1922; Sorex (Sorex) schnitnikovi Ognev 1922; Sorex (Sorex) sibiriensis Ognev 1922; Sorex (Sorex) transrypheus Stroganov 1956; Sorex (Sorex) ultimus G. Allen 1914; Sorex (Sorex) ussuriensis Okhotina 1983. Distribution: Sakhalin Isl; Siberia, from the Pechora River to Chukotka, south to the Altai Mtns; Mongolia and NE China; Alaska (USA); Yukon, Northwest Territories (Canada). Conservation: IUCN – Lower Risk (lc). Discussion: Subgenus Sorex, S. tundrensis group (Fumagalli et al., 1999). Youngman (1975) provided evidence that tundrensis is specifically distinct from arcticus. Palearctic populations formerly referred to arcticus were included in tundrensis by Junge et al. (1983) and Okhotina (1983). Hoffmann (1987) and van Zyll de Jong (1991 b) discussed additional aspects of its taxonomy and distribution. Karyotype variable: 2n = 31-41, FN 56-60 in Siberia, 2n = 32/33, FN = 58 in Yukon, and 2n = 32/33, FN = 62 in C Alaska. Kozlovsky (1976) found irkutensis and sibiriensis to be karyotypically distinct; possibly two sibling species occur throughout the Palearctic range. Meylan and Hausser (1991) described a karyotype from Canada that was identical to some in Siberia.

Published as part of Wilson, Don E. & Reeder, DeeAnn, 2005, Order Soricomorpha, pp. 220-311 in Mammal Species of the World: a Taxonomic and Geographic Reference (3 rd Edition), Volume 1, Baltimore :The Johns Hopkins University Press on page 298, DOI: 10.5281/zenodo.7316519