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刘铸,赵婧瑜,赵鑫旭,张玉红,田新民,蔡赫,陈欢,张隽晟.2022.贵州六盘水发现褐腹长尾鼩鼱滇西亚种(Episoriculus caudatus umbrinus).动物学杂志,57(4):612-619.
贵州六盘水发现褐腹长尾鼩鼱滇西亚种(Episoriculus caudatus umbrinus)
Episoriculus caudatus umbrinus Found in Liupanshui, Guizhou Province, China
投稿时间:2021-10-14  修订日期:2022-05-02
DOI:10.13859/j.cjz.202204015
中文关键词:  鼩形目  褐腹长尾鼩鼱滇西亚种  贵州省  分布新记录种
英文关键词:Soricomorpha  Episoriculus caudatus umbrinus  Guizhou Province  Distribution of new record species
基金项目:黑龙江省自然科学基金项目(No. LH2021C095),黑龙江省省属高等学校基本科研业务费科研项目(No. 1355JG002,1451TD002,1451PT008)
作者单位E-mail
刘铸 牡丹江师范学院生命科学与技术学院 牡丹江 swxlz0@126.com 
赵婧瑜 牡丹江师范学院生命科学与技术学院 牡丹江 15146996423@139.com 
赵鑫旭 牡丹江师范学院生命科学与技术学院 牡丹江 2301078785@qq.com 
张玉红 牡丹江师范学院生命科学与技术学院 牡丹江 1804350228@qq.com 
田新民 牡丹江师范学院生命科学与技术学院 牡丹江 swxtxm@126.com 
蔡赫 牡丹江师范学院生命科学与技术学院 牡丹江 swxch777@126.com 
陈欢 牡丹江师范学院生命科学与技术学院 牡丹江 swxch@126.com 
张隽晟 牡丹江师范学院生命科学与技术学院 牡丹江 swxzjs@126.com 
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中文摘要:
      在贵州省六盘水市杨梅乡慕尼克村,利用陷阱法捕捉到褐腹长尾鼩鼱滇西亚种(Episoriculus caudatus umbrinus)雌性2号。本次采集的标本体型较小,头体长分别为57.2 mm和50.4 mm,尾长(53.2 mm和46.7 mm)略短于头体长。尾部背腹色差较小,腹面略呈现褐色。后足长分别为11.9 mm和12.4 mm。颅全长17.28 mm和17.23 mm,上颌骨较宽(5.02 mm和4.96 mm)与腭齿长(7.72 mm和7.56 mm)之比为65.31%。上门齿1枚,上单尖齿4枚,第1单尖齿和第2单尖齿大小近似,明显大于第3单尖齿,第4单尖齿微小,着生于第3单尖齿和前臼齿缝隙内侧。上颌1枚前臼齿,3枚臼齿,第3枚臼齿小。利用已报道的长尾亚洲鼩属检索表进行检索,鉴定上述采集物种为褐腹长尾鼩鼱滇西亚种。基于Cyt b基因全序列(1 140 bp),采集标本与长尾亚洲鼩属中的褐腹长尾鼩鼱滇西亚种遗传距离最近,在0.030 ~ 0.062之间。系统发生树也显示,2号标本与褐腹长尾鼩鼱滇西亚种构成一个单系进化分支,进一步证实本次采集2号标本是褐腹长尾鼩鼱滇西亚种。
英文摘要:
      Two female specimens were trapped by the pitfall trap method in Munike Village, Yangmei Township, Liupanshui City, Guizhou Province, China. This discovery will expand our knowledge about the geographic distribution of Episoriculus. Morphological characterization, and measurements about external and cranial features were used in morphological studies. Genetic distances were calculated and phylogenetic tree was constructed based on the complete sequence of mtDNA Cyt b gene (1 140 bp) in molecular biology research (Table 1). The head and body length of the two specimens are 57.2 mm and 50.4 mm, with their tail lengths (53.2 mm and 46.7 mm) slightly shorter than the head and body lengths. There is little color difference between the back and the ventral surface of the tail, and the ventral surface is slightly brown. Hind feet length is 11.9 mm and 12.4 mm. Condyloincisive length is 17.28 mm and 17.23 mm. Maxillary breadth is 5.02 mm and 4.96 mm. Maxillary breadth to palatoincisive length (7.72 mm and 7.56 mm) is 65.31% (Table 2). There are 1 upper incisor and 4 upper unicuspid teeth. The first and the second unicuspid tooth are similar in size, significantly larger than the third unicuspid tooth. The fourth unicuspid tooth is very tiny, and inserted in the inner side of the gap between the third unicuspid tooth and the premolar tooth. There are 1 premolar and 3 molars in the maxillary, and the third molar is smaller. There are 1 incisor, 1 unicuspid, 1 premolar and 3 molars in the mandible. Based indentification on key to Episoriculus, the specimens collected are determined as E. caudatus umbrinus. The genetic distances between E. c. umbrinus specimen recorded and our specimens were the nearest between 0.030 and 0.062, based on mitochondrial cytochrome b gene. It was shown that our specimen lay in a monophyletic clade together with E. c. umbrinus in the phylogenetic tree, further confirming our identification. Phylogenetic Bayesian tree of the genus Episoriculus shows that E. c. umbrinus has the closest relationship of phylogeny with E. sacratus, followed by E. c. caudatus. The two specimens of E. c. umbrinus are not only the new record of E. caudatus and E. c. umbrinus in Guizhou Province, but also the new record of the genus Episoriculus in Guizhou Province.
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