A New Fossil Erinaceidae from the Shajingyi Area in the Lanzhou Basin, China

作     者：LI Zhichao LI Yongxiang XUE Xiangxu LI Wenhou ZHANG Yunxiang YANG Fu 

作者机构：School of Earth Science and ResourcesChang’an UniversityXi’an 710054China State Key laboratory of Continental DynamicsDepartment of GeologyNorthwest UniversityXi’an 710069China Key Laboratory of Coal Resources Exploration and Comprehensive UtilizationMinistry of Land and ResourcesXi’an 710021China 

出 版 物：《Acta Geologica Sinica(English Edition)》 (地质学报（英文版）)

年 卷 期：2019年第93卷第4期

页      面：789-798页

核心收录：

学科分类：070903[理学-古生物学与地层学(含：古人类学)] 0709[理学-地质学] 07[理学] 

基　　金：supported by the National Natural Science Foundation of China(No.41290253) 

主　　题：Erinaceidae Oligoechinus Lanzhou basin Oligocene 

摘      要：Here,we describe a new primitive Erinaceidae species,Oligoechinus lanzhouensis ***.,based on a specimen from late Oligocene strata of the Lanzhou Basin,Gansu *** characteristics are as follows:the M1 width is longer than the length,the metastyle extends far disto-labially,the posterior margin has strong curve and a distinct metaconule that is connected to the protocone by a postprotocrista is located in the centre of the *** posterior arm of the metaconule is poorly *** the P4,the pterion of the metastyle is less developed and the metacone is *** addition,*** has a premolar larger than the canine tooth(P2C)and P3 had no molarisation,characters also possessed by ***,*** was similar to Mioechinus based on architectural tooth features,demonstrating a closed genetic *** Erinaceidae are relatively rare before the *** discovery of *** provides an important insight into the origin of Mioechinus in China and the early evolution of the *** analysis shows that a relatively recent ancestor of Mioechinus had probably existed in the early Oligocene and that *** was likely an ancestral type of Mioechinus gobiensis,and its systematic position should be located at a transitional position between Amphechinus and Mioechinus.