A new Early Oligocene peradectine marsupial (Mammalia)from the Burqin region of Xinjiang, China
- 129 Downloads
Tertiary marsupial records are very scarce in Asia. A new peradectine marsupial, Junggaroperadectes burqinensis gen. et sp. nov., is reported from the Early Oligocene Keziletuogayi Formation in the Burqin region, Xinjiang, China. This new species is based on a single right upper M2. The tooth possesses a straight centrocrista, a characteristic of peradectines. Its main cusps lean buccally, with the paracone being smaller and lower than the metacone. The conules and stylar cusps are weakly developed. These characters distinguish J. burqinensis from Euro-American Tertiary peradectines, but they also imply a close phylogenetic relationship to Siamoperadectes and Sinoperadectes, two Asian Early Miocene peradectines.
KeywordsOligocene Late Eocene Junggar Basin Main Cusp Narrow Groove
We thank Dr. Bi Shundong, Messrs. Su Jianfeng and Wei Yongpeng for field assistance; Profs. Daniel L. Gebo, Li Chuankui, and Qiu Zhuding for instructive and helpful comments on the manuscript. The work is supported by the National Natural Science Foundation of China (NSFC 40202003, 40472022) and the Chinese Academy of Sciences.
- Gabunia LK, Shevyreva NS, Gabunia VD (1984) On the presence of fossil marsupials in Asia. Bul Acad Sci Georgian SSR 116:169–171Google Scholar
- Gabunia LK, Shevyreva NS, Gabunia VD (1990) A new opossum (Didelphidae, Marsupialia, Metatheria, Mammalia) from the lowermost Oligocene in the Zaysan Basin (Eastern Kazakhstan). Paleontol J 24:61–68Google Scholar
- Gill T (1872) Arrangement of the families of mammals with analytical tables. Smithson Misc Collect 11:1–98Google Scholar
- Gray JE (1821) On the natural arrangement of vertebrose animals. Lond Med Repos 15:296–310Google Scholar
- Korth WW (1994) Middle Tertiary marsupials (Mammalia) from North America. J Paleontol 68:376–397Google Scholar
- Krishtalka L, Stucky RK (1983) Paleocene and Eocene marsupials of North America. Ann Carnegie Mus 52:229–263Google Scholar
- Maas MC, Thewissen JGM, Kappelman J (1998) Hypsamasia seni (Mammalia: Embrithopoda) and other mammals from the Eocene Kartal Formation of Turkey. In: Beard KC, Dawson MR (eds) Dawn of the age of mammals in Asia. Carnegie Museum of Natural History, Pittsburgh, pp 286–297Google Scholar
- Qi T, Beard KC, Wang B, Dawson MR, Guo J, Li C (1996) The Shanghuang mammalian fauna, middle Eocene of Jiangsu: history of discovery and significance. Vertebrata PalAsiatica 34:202–214Google Scholar
- Woodburne MO, Zinsmeister WJ (1984) The first land mammal from Antarctica and its biogeographic implications. J Paleontol 58:913–948Google Scholar
- Ye J, Meng J, Wu W, Ni X (2005) Lithological and biostratigraphic sequence across the Eocene-Oligocene boundary in Burqin of Xinjiang. Vertebrata PalAsiatica 43:49–60Google Scholar