第58卷 第1期 古 脊 椎 动 物 学 报 pp. 45–66 2020年1月 VERTEBRATA PALASIATICA figs. 1–5 DOI: 10.19615/j.cnki.1000-3118.190724 New gobiconodontid (Eutriconodonta, Mammalia) from the Lower Cretaceous Shahai and Fuxin formations, Liaoning, China KUSUHASHI Nao1 WANG Yuan-Qing2,3,4* LI Chuan-Kui2 JIN Xun2 (1 Department of Earth’s Evolution and Environment, Graduate School of Science and Engineering, Ehime University Matsuyama, Ehime 790-8577, Japan
[email protected]) (2 Key Laboratory of Vertebrate Evolution and Human Origins of Chinese Academy of Sciences, Institute of Vertebrate Paleontology and Paleoanthropology, Chinese Academy of Sciences Beijing 100044, China * Corresponding author:
[email protected]) (3 CAS Center for Excellence in Life and Paleoenvironment Beijing 100044, China) (4 College of Earth and Planetary Sciences, University of Chinese Academy of Sciences Beijing 100049, China) Abstract Eutriconodontans are one of the key members of mammals to our understanding of the evolution and transition of mammalian fauna in Asia during the Cretaceous. Two gobiconodontid and two triconodontid species have previously been reported from the upper Lower Cretaceous Shahai and Fuxin formations. Here we describe two additional eutriconodontans from the formations, Fuxinoconodon changi gen. et sp. nov. and ?Gobiconodontidae gen. et sp. indet. This new species is attributed to the Gobiconodontidae, characterized by having an enlarged first lower incisor, reduction in the number of incisors and premolariforms, proportionally large cusps b and c being well distant from cusp a on the molariforms, presence of a labial cingulid, and a unique mixed combination of molariform characters seen on either the first or the second, but not both, generations of molariforms in Gobiconodon.