【摘要】 本文对分布在甘肃及其附近地区黄鼠的分类位置提出不同看法.从甘肃及其附近地区的4000余号标本中随机选出200号标本.证明这种黄鼠与其它种存在不同的特点.其不同之处为(1)体长为204毫米.尾长为66.6毫米,尾长约占体长的1/3;(2)雌体具乳头4对;(3)眶间宽约占颅全长的22%;听泡宽约为长的77%;(4)每胎平均4.4个;5、染色体2n=36,占94%,其中中部着丝点3对,亚中部着丝点14对.故分布在甘肃及其附近地区的黄鼠为 Citellus alachanicus Buchener 1988.更多还原

【Abstract】 At Present there are different viewpoints in the systematic positionof the the suslik in Gansu and ist vicinity.A total of 200 specimensselected from more than 4000 abult suslik samples collected from Gansu andits vicinity were examined.After making comparisons of the specimentwith published records and other specimens,we find that the suslikdistributed in Gansu and its vicinity is characterized by the followingfeatures:1.The average of head and body length in 204mm,the tail lengthis 66.6mm.The tail length is about one third of the head and bodylength.2.There are 4 pairs of teats in female.3.The width between orbitis greatre about 22% of the total skulllength.The bulla tympani extends very well,its width is about 77% of itslength.4.The fertility is relatively weak,the average of embryos per is4.4.5.The chromosome numbers of each cell were counted and analysed94.0 per cent of the diploid number(2n=36),among M=3 pairs,ST.T=14 pairs.We are of the opinion that the suslik distributed in Gansu and itsvicinity mutt belong to Citellus alaschanicus Buchener 1888.更多还原