• 责任者：Wang Haibing (Key Laboratory of Vertebrate Evolution and Human Origins ; Institute of Vertebrate Paleontology and Paleoanthropology ; Chinese Academy of Sciences ; Beijing 100044 ; China) ; Bai Bin
• 刊名：Vertebrata Palasiatica
• 出版年：2013
• 卷期：51(4)
• 关键词：犀超科 ; Rhinocerotoidea ; 云南 ; Yunnan Province
• 页码：p.305-320
• 图表：3 illus., 1 table, 46 refs.
• 分类号：1101
• issnNo：ISSN1000-3118
• isbnNo：CN11-1905/Q

     Rhinocerotoid fossils are relatively abundant in Paleogene deposits in South China. Many previous studies have investigated Paleogene rhinocerotoids from Yunnan Province （Russell and Zhai, 1987; Zong et al., 1996）. Zhang （1981） briefly reported some fossils from Xiaoguangnan Village, Guangnan, Yunnan Province, within the Guangnan Basin. Recently, a new specimen comprising a fragmentary left mandible was recovered from the Paleogene of Xiaoguangnan. The new fossil is referable to the rhinocerotoid clade Eggysodontidae. Mainly based on its less molarized p3-p4, the new specimen is regarded as intermediate between the primitive Late Eocene taxon Proeggysodon and the derived Oligocene genera Eggysodon and Allacerops. Here we describe the new specimen and discuss the age of the Yanshan Formation. Terminology used to describe dental features follows Qiu and Wang （2007）.