气候变化与早期兔形类的演化:基于内蒙古Ordolagus新材料的研究
Climate change and evolution of early lagomorphs(Mammalia):a study perspective based on new materials of Ordolagus from Nei Mongol(northern China)
摘要
Abstract
The Early Oligocene is a critical time for global climate changes in the Cenozoic.This epoch witnessed severe mammalian faunal turnovers known as"Grande Coupure"in Europe and"Mongolian Remodelling"in Asia.However,insights about morphological changes in Oligocene mammal lineages have not been explored in detail.One of the least diversified groups of recent mammals,lagomorpha,is globally common in the fossil records,especially in Asia.During the Oligocene,many Eocene archaic lagomorph taxa died out and were replaced by more advanced forms.New findings from Nei Mongol and re-examination of the specimens from older collections enabled a revision of a common Asian lagomorph genus,Ordolagus,which possibly has a close affinity with the Middle-Late Eocene genus Gobiolagus.In Nei Mongol,we recognized the presence of Ordolagus during the basal Early Oligocene.Comparisons with coeval and slightly older lagomorph taxa from Asia and North America show that Ordolagus attained some salient tooth morphological characters(i.e.,development of anteroconid on p3,full hypselodonty of cheek teeth,and lingual connection of trigonid and talonid on p4-m2),which are also the key features of modern leporids.The appearance of those morphologic features in Ordolagus is coeval to major global or regional climatic changes.Further investigations on Asian early lagomorphs compared with the study of other small mammals and local climatic factors will be essential to refine the role of lagomorphs as palaeoclimatic proxies.关键词
内蒙古/古近纪/兔科/分类学/演化趋势/趋同模式/干旱化/气候恶化Key words
Nei Mongol/northern China/Paleogene/Leporidae/taxonomy/evolutionary trends/convergence patterns/aridity/climate deterioration分类
生物科学引用本文复制引用
安晓青,张兆群..气候变化与早期兔形类的演化:基于内蒙古Ordolagus新材料的研究[J].古脊椎动物学报,2021,59(2):138-168,31.基金项目
中国科学院战略性先导科技专项(编号:XDB26000000)、中国科学院古生物化石发掘与修理专项和国家自然科学基金(批准号:41472003)资助.We thank all our colleagues and students participating the field excavation in Ulantatal and Saint Jacques.Mr.Gao Wei took the photos.We also appreciate the help from curators of AMNH,MNHN,IVPP,necessary for the study on the type specimen and comparative materials.We are also grateful to Prof.Alisa Winkler who,in addition to her valuable scientific advice,provided also a revision of the English language.This work has been supported by XDB26000000 of CAS,special fund for fossil excavation and preparation of CAS,and NSFC(41472003).CA was supported by:Visiting Professor grant of the President's International Fellowship Initiative of the Chinese Academy of Science （编号:XDB26000000）
Agencia Estatal de Investigación de Espa?a and the European Regional Development Fund of the European Union(CGL2016-76431-P) （CGL2016-76431-P）
CERCA Program,Generalitat de Catalunya （）
Grant to Department of Science,Roma Tre University(MIUR-Italy Dipartimenti di Eccellenza,ART.1,C.314-337 L.232/2016). （MIUR-Italy Dipartimenti di Eccellenza,ART.1,C.314-337 L.232/2016）
