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The earliest known eutherian mammal
- Q. Ji, Zhe‐Xi Luo, Chongxi Yuan, J. Wible, Jian-Ping Zhang, J. Georgi
- Geography, Environmental ScienceNature
- 25 April 2002
The skeleton of a eutherian (placental) mammal found in northeastern China has limb and foot features that are known only from scansorial and arboreal extant mammals, in contrast to the terrestrial or cursorial features of other Cretaceous eutherians.
An Early Cretaceous Tribosphenic Mammal and Metatherian Evolution
New data from this fossil support the view that Asia was likely the center for the diversification of the earliest metatherians and eutherians during the Early Cretaceous.
A Jurassic eutherian mammal and divergence of marsupials and placentals
This mammal has scansorial forelimb features, and provides the ancestral condition for dental and other anatomical features of eutherians, reducing and resolving a discrepancy between the previous fossil record and the molecular estimate for the placental–marsupial divergence.
A Swimming Mammaliaform from the Middle Jurassic and Ecomorphological Diversification of Early Mammals
- Q. Ji, Zhe‐Xi Luo, Chongxi Yuan, Alan R. Tabrum
- Geography, Environmental ScienceScience
- 24 February 2006
This fossil demonstrates that some mammaliaforms, or proximal relatives to modern mammals, developed diverse locomotory and feeding adaptations and were ecomorphologically different from the majority of generalized small terrestrial Mesozoic mammalian insectivores.
An Early Ostrich Dinosaur and Implications for Ornithomimosaur Phylogeny
A new ornithomimosaur from the Yixian Formation of Liaoning Province People's Republic of China is described and this taxon is placed in a phylogenetic analysis of Coelurosauria and shown to be near the base of the ornithological clade.
Earliest Evolution of Multituberculate Mammals Revealed by a New Jurassic Fossil
- Chongxi Yuan, Q. Ji, Qingjin Meng, Alan R. Tabrum, Zhe‐Xi Luo
- Environmental Science, GeographyScience
- 16 August 2013
A new basal multi is described from a nearly complete skeleton that shows that the underpinnings of these adaptations arose early in the evolution of the order, setting the stage for the major diversification and radiation of the group that came during the Cretaceous and Paleogene.
Evolutionary Development of the Middle Ear in Mesozoic Therian Mammals
A Cretaceous trechnotherian mammal with an ossified Meckel’s cartilage in the adult is reported, showing that homoplastic evolution of the DMME occurred in derived therian mammals, besides the known cases of eutriconodonts.
Convergent dental adaptations in pseudo-tribosphenic and tribosphenic mammals
The find reveals a much greater range of dental evolution in Mesozoic mammals than in their extant descendants, and strengthens the hypothesis of homoplasy of ‘tribosphenic-like’ molars among mammals.
Palaeontology: 'Modern' feathers on a non-avian dinosaur
- M. Norell, Q. Ji, K. Gao, Chongxi Yuan, Yibin Zhao, Lixia Wang
- Environmental Science, GeographyNature
- 7 March 2002
The occurrence of pinnate feathers, which clearly feature a rachis and barbs, on a small, non-avian dromaeosaur from northern China indicates that feathers of modern aspect evolved in dinosaurs before the emergence of birds and flight.
A PRELIMINARY REPORT ON THE NEW DINOSAURIAN FAUNA FROM THE CRETACEOUS OF THE RUYANG BASIN, HENAN PROVINCE OF CENTRAL CHINA
A new dinosaur fauna, the Ruyang Gigantic Sauropod Dinosaurian Fauna from the early Late Cretaceous of the Ruyang Basin is named. The new dinosaurian fauna is dominated by large-sized sauropod…