Proeggysodon Gen. nov., a Primitive Eocene Eggysodontine (Mammatia, Perissodactyla) from Erden Obo, Siziwangqi, Inner Mongolia, China
详细信息
- 责任者：Bai Bin (Key Laboratory of Evolutionary Systematics of Vertebrates ; Institute of Vertebrate Paleontology and Paleoanthropology ; Chinese Academy of Sciences ; Beijing 100044 ; China) ; Wang Yuanqing
- 刊名：Vertebrata Palasiatica
- 出版年：2012
- 卷期：50(3)
- 关键词：犀超科 ; Rhinocerotoidea ; 内蒙古 ; Inner Mongolia
- 页码：p.204-218
- 图表：6 illus., 2 tables, 49 refs.
- 分类号：1101
- issnNo：ISSN1000-3118
- isbnNo：CN11-1905/Q
摘要
In this paper, the authors report a new primitive Late Eocene eggysodontine, Proeggysodon qiui gen. et sp. nov., from Erden Obo, Siziwangqi, Inner Mongolia, China. Furthermore, the authors propose that eggysodontines and forstercooperes are closely related, mainly because they share the following features: large and erect canine, relatively short diastema between canine and cheek teeth, and dorsoventrally deep and anteroposteriorly abbreviated symphysis associated with nearly vertically implanted incisors. The new specimen narrows the time gap between the Early to Middle Eocene forstercooperes and the Oligocene eggysodontines. The discovery of Proeggysodon in Asia also suggests that eggysodontines dispersed from this continent into Europe after the “Grande Coupure”.