关键词: 苔原鼩鼱, 新记录, 中国

Abstract:

Four specimens (NM1,NM2,NM3,NM4) of genus the Sorex were trapped by the pitfall trap method in Eerguna National Nature Reserve,Inner Mongolia,China,in August,2008. All specimens are small,with tail lengths less than 32 mm,and resembled S. minutissimus. The length of the condylo-incisive length varied from 16.50 to 17.24 mm , which exceeded that reported for S.minutissimus (15 mm). To identify the taxonomic status of the specimens,we sequenced

mitochondrial cytochrome b genes. We combined our data with sequences of Sorex retrieved from GenBank to construct a phylogenetic tree. Our 4 specimens from Inner Mongolia clustered with S. tundrensis, and formed a well supported monophyletic clade. We found that the genetic distances between downloaded S. tundrensis sequences and our sequences were very small. Thus, we consider these four specimens to be S. tundrensis and are a new record of the species in China.

Key words: China, New record, Tundra shrew (Sorex tundrensis)