甘肃临夏盆地广河县古城的早中新世小哺乳动物化石
Early Miocene micromammal fossils from Gucheng in Linxia,Gansu,China
摘要
Abstract
The micromammal fossils collected from the Shangzhuang Formation of the Linxia Basin,Gansu,are described here.The assemblage consists of 16 species of 13 genera belonging to 7 families,including one new species and one taxon previously unknown from China.Among them 5 genera are Oligocene holdovers and 11 genera/species are known to make their first appearances in Early Miocene,indicating an Early Miocene age for the Gucheng Fauna.The absence of Oligocene survivors such as Tataromys,Yindirtemys,Eucricetodon and Tachyoryctoides,which usually occur in the Xiejian age of Early Miocene,and the presence of newcomers Protalactaga,Megacricetodon and Gobicricetodon,that made their first appearance only in the Shanwangian age of late Early Miocene,suggest that the Gucheng Fauna is of a later age of Early Miocene.The new species,Sinolagomys guchengensis,showing more derived morphology than in S.ulunguensis,seems to support an assessment of the fauna in Shanwangian age.Thus,the Gucheng Fauna may belong to late Early Miocene Shanwangian,partially equivalent to MN 3/4 of the European land mammal zonation.Ecological analysis of the fauna indicates that the palaeoecological condition of the Gucheng area might still be a predominantly arid shrub-steppe in late Early Miocene.关键词
甘肃临夏古城/早中新世晚期/上庄组/小哺乳动物化石Key words
Gucheng,Linxia,Gansu/late Early Miocene/Shangzhuang Formation/micromammal fossils分类
生物学引用本文复制引用
王伴月,邱铸鼎,李录..甘肃临夏盆地广河县古城的早中新世小哺乳动物化石[J].古脊椎动物学报（中英文）,2025,63(2):102-132,31.基金项目
中国科学院前沿科学重点研究项目(编号:QYZDY-SSW-DQC022)和国家自然科学基金(批准号:42372028)资助. The authors would like to express their gratitude to Profs.Zhang Zhaoqun and Deng Tao from Institute of Vertebrate Paleontology and Paleoanthropology,Chinese Academy of Sciences(IVPP)for their valuable discussion （编号:QYZDY-SSW-DQC022）
to Prof.Ni Xijun of IVPP and Dr.B.Engesser and Mr.Oppliger of Naturhistorisches Museum Basel,Switzerland for their hard work in collecting fossils in the field （）
to Dr.Wang Xiaoming from Natural History Museum of Los Angeles County,USA for criticizing the manuscript and correcting the English.Many thanks are also given to Miss Si Hongwei and Mr.Wang Ping of IVPP for the preparation work on the specimens,Mr.Hou Yemao,Miss Zhang Xiaomei and Miss Wang Jia of IVPP for CT scanning.Many thanks are also given to Dr.Li Qiang and Dr.Larry Flynn for their critiquing the manuscript and giving good suggestions.This work is supported by the Frontier Science Key Research Project of the Chinese Academy of Sciences(QYZDY-SSW-DQC022)and the National Natural Science Foundation of China(42372028). （QYZDY-SSW-DQC022）
