Teeth-Shape Analysis and the Species Sequence of Microtinae from Zhangping Caves and the Nearby Ones

详细信息   

• 责任者：Li Yongxiang (State Key Laboratory of Continental Dynamics ; Department of Geology ; Northwest University ; Xi’an 710069 ; China) ; Xue Xiangxu
• 刊名：Journal of Northwest University
• 出版年：2008
• 卷期：38(2)
• 关键词：更新世 ; Pleistocene ; 鼠科 ; Muridae ; 秦岭 ; Qinling Mountains
• 页码：p.273-276
• 图表：5 illus., 1 table, 15 refs.
• 分类号：1103
• issnNo：ISSN1000-274X
• isbnNo：CN61-1072/N

摘要

Aim To discuss the teeth-shape variations and the species sequence in Microtinae. Using the classical palaeotology methods including measuring, statistics and comparing with other locality fossils, the L/W ratios of M3 and m1 are of most width in teeth-line of the Microtinae. The Is5 tend close from wide to narrow and the Is6 appear and reduce. Most recent work has focused on morphological changes in the molars, especially in M3 and m1, and the rezones may be caused by their special shape and position in teeth-line.