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[dinosaur] Xingtianosaurus, new caudipterid oviraptorosaur from Lower Cretaceous of China (free pdf)





Ben Creisler
bcreisler@gmail.com


A new paper with free pdf:

Xingtianosaurus ganqi gen. et sp. nov.Â


Rui Qiu, Xiaolin Wang, Qiang Wang, Ning Li, Jialiang Zhang & Yiyun Ma (2019)
A new caudipterid from the Lower Cretaceous of China with information on the evolution of the manus of Oviraptorosauria.
Scientific Reports 9, Article number: 6431Â
doi: https://doi.org/10.1038/s41598-019-42547-6
https://www.nature.com/articles/s41598-019-42547-6

Free pdf:
https://www.nature.com/articles/s41598-019-42547-6.pdf

Caudipteridae is a basal clade of Oviraptorosauria, all known species from the Early Cretaceous Jehol Biota of northeastern China. They were one of the first feathered dinosaur groups discovered, and possessed avian-like pennaceous remiges and rectrices. Their discovery provided significant information on early oviraptorosaurian evolution and the origins of birds and feathers. Here we describe a new caudipterid species Xingtianosaurus ganqi gen. et sp. nov. from the Lower Cretaceous Yixian Formation of Liaoning Province, China. This new taxon differs from other caudipterids by a small pleurocoel close to the dorsal edge of the lateral surface of the dorsal vertebrate centrum, a humerus longer than the scapula, a proportionally long ulna, a relatively small radiale angle, and a relatively short metacarpal I. The phylogenetic results shows X. ganqi is an early diverging caudipterid. It exhibits a mosaic morphology, providing new morphological information on early manual evolution of Oviraptorosauria, and giving new light on the evolution of radiale angle among Coelurosauria.

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