作者：Lucja Fostowicz-Frelik, 李传夔，孟 津，王元青

摘要：描述了来自内蒙古二连盆地的戈壁兔新材料，并命名了一个戈壁兔新种Gobiolagus aliwusuensis sp. nov.。化石产于额尔登敖包剖面中阿里乌苏地点，传统地层划分中的下红层，时代约为中始新世。该种具有中等个体，P3主尖前壁具有小的附尖，P4颊侧有两个明显的尖。这些化石材料保存了戈壁兔材料中仅有的完整上齿列，其中的P2和M3形态是首次报道，为了解亚洲早期兔形类的演化增加了新的信息。

关键词：内蒙古，始新世，兔形类干群，戈壁兔属，牙齿形态，进化

卷期：50卷 03期

New Gobiolagus (Mammalia: Lagomorpha) material from the Middle Eocene of Erden Obo (Nei Mongol, China)

Lucja Fostowicz-Frelik, Li Chuan-kui, Meng Jin, Wang Yuan-Qing

Abstract  A new species of Gobiolagus (Lagomorpha: Palaeolagidae) from the Middle Eocene locality of Aliwusu (Erlian Basin, Nei Mongol, China) is described. Gobiolagus aliwusuensis sp. nov. is characterized by its medium size, accessory cusp on the anterior wall of P3 central lobe and by two distinct buccal cusps on P4. The material from Aliwusu constitutes the only record of Gobiolagus with complete upper dental rows, which contain previously unknown P2 and M3. This discovery adds new data on the morphology and diversification of Middle Eocene lagomorph fauna in Central Asia.
Key words  Nei Mongol, Eocene, stem lagomorphs, Gobiolagus, dental morphology, evolution