Strenulagus(Mammalia: Lagomorpha) from the Middle Eocene Irdin Manha Formation of the Erlian Basin, Nei Mongol, China  

作　　者：Lucja FOSTOWICZ-FRELIK LI Chuankui LI Qian MENG Jin WANG Yuanqing 

机构地区：[1]Key Laboratory of Vertebrate Evolution and Human Origins of Chinese Academy of Sciences, Institute of Vertebrate Paleontology and Paleoanthropology, Chinese Academy of Sciences [2]Institute of Paleobiology, Polish Academy of Sciences [3]Division of Paleontology, American Museum of Natural History

出　　处：《Acta Geologica Sinica(English Edition)》2015年第1期12-26,共15页地质学报（英文版）

基　　金：supported by the Young International Scientist Grant of the Chinese Academy of Sciences (No. 2013Y1ZA0006) to LFF;the Major Basic Research Projects of MST of China (Nos. 2012CB821900 and 2006CB806400);the Chinese Academy of Sciences (No. KZCX2-EW-106);the Special Fund for Fossil Excavation and Preparation of the Chinese Academy of Sciences, and the China Geological Survey (Nos. 1212011120115 and 1212011120142)

摘　　要：New material of Strenulagus solaris, a stem lagomorph, from the lower part of the Middle Eocene Irdin Manha Formation at the Irdin Manha and Huheboerhe localities, Erlian Basin, Nei Mongol, China includes remains of isolated cheek teeth, fragmentary upper incisors （dI2） and postcranial elements, reported from the species for the first time. The tarsal bones display advanced features, such as a wide calcaneofibular articulation surface and, along with an increase in hypsodonty, the new data document the early stage of lagomorph evolution in the Middle Eocene of the Erlian Basin. This finding is stratigraphically well constrained and probably predates that of the type material of S. solaris from the Khaychin Formation, Bugin-Tsav Basin, Mongolia.New material of Strenulagus solaris, a stem lagomorph, from the lower part of the Middle Eocene Irdin Manha Formation at the Irdin Manha and Huheboerhe localities, Erlian Basin, Nei Mongol, China includes remains of isolated cheek teeth, fragmentary upper incisors （dI2） and postcranial elements, reported from the species for the first time. The tarsal bones display advanced features, such as a wide calcaneofibular articulation surface and, along with an increase in hypsodonty, the new data document the early stage of lagomorph evolution in the Middle Eocene of the Erlian Basin. This finding is stratigraphically well constrained and probably predates that of the type material of S. solaris from the Khaychin Formation, Bugin-Tsav Basin, Mongolia.

关 键 词：Vertebrate paleontology stem lagomorphs morphology Paleogene Land Mammal Ages Inner Mongolia 

分 类 号：Q915[天文地球—古生物学与地层学]