甘肃临夏盆地早更新世旋角羚羊化石的首次发现
First discovery of the spiral-horned antelope Antilospira(Bovidae,Artiodactyla)from the Linxia Basin,Gansu,China
摘要
Abstract
Antilospira is a small to medium-sized antelope with heteronymously spiraled horn cores.It was widely distributed in northern China from the Late Pliocene to the Early Pleistocene.It is a typical fossil bovid with important implications for biostratigraphy and antilopin evolution in China.Antilospira robusta is a species with highly fragmentary materials and has previously only been briefly discussed.Here we report on a new frontal with horn cores from the Early Pleistocene Wucheng Loess in Nalesi Township,Dongxiang Autonomous County,Linxia Basin,Gansu Province.This new material features heteronymously spiraled horn cores,deep longitudinal grooves,a sharp anterior carena on the horn core,and a large body size,which are characteristics similar to those of A.robusta.However,the horn base of the new material is more compressed than all the previously discovered spiral-horned antelopes,so we attributed it to Antilospira cf.A.robusta.This is the first time Antilospira has been found in northwestern China,and this discovery provides more morphological data for the classification of this group.CT scans of the horn core reveal the well-remodeled horn core trabeculae in Antilospira,which is different from what is observed in Spirocerus.The frontal sinuses are moderately developed in the Linxia specimen,extending backwards to the orbit but not to the horn base.The virtual reconstruction of the endocranial cast indicated that Antilospira has bending and narrow frontal lobes,wide temporal lobes,and relatively complex sulci on the cerebral hemisphere,which differ from extant Antilopini bovids in China.关键词
临夏盆地/早更新世/旋角羚羊/牛科动物Key words
Linxia Basin/Early Pleistocene/spiral-horned antelope/bovid分类
生物科学引用本文复制引用
许兴栋,史勤勤..甘肃临夏盆地早更新世旋角羚羊化石的首次发现[J].古脊椎动物学报（中英文）,2026,64(1):47-58,12.基金项目
国家自然科学基金(批准号:42472042)和中国科学院古脊椎动物与古人类研究所自主部署项目资助. This paper is dedicated to Prof.Qiu Zhanxiang,who made significant contributions to the study of Chinese Cenozoic fossil mammals,stratigraphy,and biochronology.We thank Su Dan for preparing the fossil,Gao Wei for taking the photographs,Chen Jin for her assistance in comparing fossil specimens housed at the IVPP,Li Dongsheng for his help in comparing extant specimens housed at the IVPP,and Hou Yemao for his assistance with CT scanning.We thank Liu Wenhui for his useful discussions.We thank the two reviewers for their helpful suggestions.This study is supported by the National Natural Science Foundation of China(42472042),and the Key Research Program of the Chinese Academy of Sciences. （批准号:42472042）
