对晚始新世古蒙语鼠相似种(啮齿目:壮鼠科)的综合研究
Comprehensive research on Late Eocene Hulgana cf.H.ertnia(Rodentia:Ischyromyidae)
摘要
Abstract
A relatively well-preserved rodent fossil,including its incisors,cheek teeth,and postcranial skeleton,was collected from the Baiyin Obo in Siziwang Banner,Nei Mongol.A multifaceted research approach was undertaken in this study to conduct a comprehensive analysis on the newly discovered specimen.Based on a morphological comparison,the new specimen was identified as Hulgana cf.H.ertnia within the Ischyromyidae family.Incisive enamel microstructure analysis revealed the typical pauciserial enamel structure of Hulgana.Bone histological analysis indicates that the specimen represents a juvenile individual,which is consistent with the ontogenetic stage indicated by dental developmental stage and wear pattern.The application of geometric morphometrics to the calcaneus and bone histology of the femur and phalanx further substantiates the taxonomic classification of Hulgana as a terrestrial and cursorial rodent,exhibiting a degree of fossorial ability.This classification is analogous to that of certain extant cricetids and ground squirrels.关键词
内蒙古白音敖包/晚始新世/蒙语鼠属/几何形态测量学/运动方式/釉质微观结构/骨组织学Key words
Baiyin Obo,Nei Mongol/Late Eocene/Hulgana/geometric morphometrics/locomotion/enamel microstructure/bone histology分类
生物科学引用本文复制引用
李岚馨,李茜..对晚始新世古蒙语鼠相似种(啮齿目:壮鼠科)的综合研究[J].古脊椎动物学报（中英文）,2025,63(3):189-209,21.基金项目
国家自然科学基金(批准号:42072023)和中国科学院战略性先导科技专项(编号:XDB26000000)资助. We thank Wang Yuanqing,Bai Bin,Zhang Xinyue,Quan Shuoshuo,Yang Yihan,Zhou Wei,Li Shijie,Wang Yongxing,Wang Yongfu,Li Qi and Pan Ruzheng of the field team for their hard work and dedication.Bai Bin gave vital suggestions on the morphology of the right navicular.Ni Xijun provided some of the comparative specimens for this paper.Hou Yemao and Yin Pengfei helped to perform the CT-scans.Jin Xun helped to perform the coating of incisors and the relative SEM scans.Zhao Qi,Zhu Yuxia and Zhang Shukang gave important suggestions and instruction during the conduction of histological experiment and analysis.Guo Te helped to photograph the histological sections.We also thank the editors and reviewers for their constructive comments on our manuscript.This work was supported by the National Natural Science Foundation of China(Grant No.42072023)and the Strategic Priority Research Program of Chinese Academy of Sciences(XDB26000000).The fieldwork was funded by the Special Fund for Fossil Excavation and Preparation,CAS. （批准号:42072023）
