古脊椎动物学报2012，Vol.50Issue(4)：335-360,26.
河北阳原山神庙咀早更新世直隶狼(Canis chihliensis)新材料
NEW REMAINS OF CANIS CHIHLIENSIS (MAMMALIA, CARNIVORA) FROM SHANSHENMIAOZUI, A LOWER PLEISTOCENE SITE IN YANGYUAN, HEBEI
摘要
Abstract
From 2006-2011,numerous Canis specimens were recovered from the newly discovered Shanshenmiaozui Locality in the Nihewan Basin.The material includes broken crania,premaxillae,maxillae,mandibles and postcranial skeleton with most of the elements preserved,and represents the most extensive and informative sample of early fossil Canis ever recovered in China.This material can be assigned to the species Canis chihliensis based on morphological and metric characters,including large size,robust I3,elongated P4 with anterior notch and well-developed protocone,M1 strongly mesiodistally compressed and with broad cingular hypocone,m 1 with metaconid and entoconid (however small),M2 and m2 large relative to M1 and ml respectively,and m2 with broad talonid.Measurements of the skulls and the teeth are similar to the equivalent measurements for Canis lupus,but those of the postcranial elements are smaller.Canis chihliensis is characterized by reduction of the lingual cuspids on the lower molars,an elongated P4,and a mesiodistally compressed M1.However,the first lower molars from Shanshenmiaozui are quite variable in the development of their lingual cuspids.This study shows that it is not easy to distinguish Canis chihliensis from Xenocyon dubius (=Cuon dubius) based exclusively on characters of the first lower molar,and the taxonomic status of the latter species is still open to question.Both of them differ greatly in morphology from the African hunting dog Lycaon pictus.Unlike in Canis chihliensis,the tooth dimensions of Xenocyon dubius are quite variable.The fossil bearing stratum at Shanshenmiaozui can be correlated with,but probably later than that at the neighboring Xiaochangliang Site,which has an age of ca.1.36 Ma.关键词
河北阳原山神庙咀/早更新世/直隶狼/m1变异/头后骨骼Key words
Shanshenmiaozui, Yangyuan, Hebei/ Early Pleistocene/ Canis chihliensis/ m1 variation/ postcranial bones分类
生物科学引用本文复制引用
同号文,胡楠,王晓鸣..河北阳原山神庙咀早更新世直隶狼(Canis chihliensis)新材料[J].古脊椎动物学报,2012,50(4):335-360,26.基金项目
国土资源部公益性行业科研专项(编号:201211005-3)、中国科学院古脊椎动物与古人类研究所重点部署项目和中国科学院化石发掘与修理特别支持费资助. （编号:201211005-3）
