黑龙江省横道河子地区发现细鼩鼱(食虫目:鼩鼱科)  

The Slender Shrew(Sorex gracillimus Thomas, 1907; Insetivora: Soricidae) was Found in Hengdaohezi of Heilongjiang Province, China

作　　者：刘铸[1] 解瑞雪 刘欢[1] 金志民[1,2] 

机构地区：[1]牡丹江师范学院生命科学与技术学院,牡丹江157011 [2]东北林业大学野生动物资源学院,哈尔滨150040

出　　处：《动物学杂志》2016年第3期487-491,共5页Chinese Journal of Zoology

基　　金：牡丹江师范学院国家级重点创新预研项目(No.GY2014001);牡丹江师范学院博士科研启动基金项目(No.MNUB201404);牡丹江师范学院研究生科技创新项目(No.yjsxscx2015-01mdjnu);黑龙江省高等学校科技创新团队攻关课题(2012)

摘　　要：在整理采自黑龙江省横道河子地区(44°48′44″N,129°02′04″E,海拔740 m)鼩鼱属(Sorex)标本时,1号雌性标本经过形态学和分子生物学鉴定为细鼩鼱(Sorex gracillimus Thomas,1907),其为黑龙江省正式记录。主要特征为颅骨近圆形;吻十分狭长;上颌门齿后尖大于前尖;上颌单尖齿逐一渐小。下颌门齿向前延伸甚长,其上切缘有4个尖齿,3个深缺刻,犬齿小,是前臼齿1/2高。对其头骨指标进行测量,颅基长为13.29 mm,颅高为4.25 mm,眶间距为2.31 mm,脑颅宽为7.84 mm,上齿列长为6.23 mm。标本的1 140 bp的Cyt b全序列与已知细鼩鼱样本的相似度为96%,与中鼩鼱(S.caecutiens)和小鼩鼱(S.minutus)的相似度分别为91%和89%。One specimen collected in Hengdaohezi county（44°48′44″ N, 129°02′04″ E, alt. 740 m）, Heilongjiang Province, China, is identified as the slender shrew（Sorex gracillimus） according to the morphological and molecular analysis. The species is considered to be formal record to the mammalian fauna of this province. Skull is almost nearly circular（Fig. 1a）. Kiss is very narrow（Fig. 1）. The behind tip is larger than the previous from maxillary incisors（Fig. 2a）. The unicuspid of maxillary is each getting smaller（Fig. 2a）. Mandibular incisor extends forward very long（Fig. 2b）. Mandibular incisor on the cutting edge has four tines and three deep notch. Canines is small, and is 1/2 high of premolars（Fig. 2b）. Skull indices of the sample were measured（Table 1）. Condylobasal length of skull was 13.29 mm. Height of cranial was 4.25 mm. Orbital spacing was 2.31 mm. Cranial breadth was 7.84 mm. Length of the upper tooth was 6.23 mm. Similarity in 1 140 bp Cyt b complete sequence of specimens and known sample of S. gracillimus is 96%. Similarity with S. caecutiens and S. minutus respectively are 91% and 89%.

关 键 词：食虫目 鼩鼱属 细鼩鼱 正式记录 

分 类 号：Q959[生物学—动物学]