Karyological Notes on the Southern Short-tailed Shrew, Blarinella wardi (Mammalia, Soricidae)

抄録

Karyological data for the southern short-tailed shrew, Blarinella wardi, were obtained from 3 specimens collected on Mt. Laojun, Lijiang District, Yunnan Province, China. We examined 35 metaphases of B. wardi. The diploid number (2n) was 32 and the fundamental autosome number (NFa) was 58. The karyotype consisted of 10 M and 4 SM pairs, one small A pair, one medium-sized M X chromosome, and one small SM Y chromosome. The autosomal complement contained one pair of M chromosomes (no. 10) bearing a secondary constriction on the proximal long arm. The range of diploid number in the genus Blarinella indicates 32 to 44. In comparison with previously reported data on the karyotype of B. griselda, the secondary constriction on one pair of metacentric and biarmed sex chromosomes are considered affinal characters of the genus Blarinella.