doi: 10.1126/science.1182143.
A basal alvarezsauroid theropod from the early Late Jurassic of Xinjiang, China
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- PMID:20110503
- DOI: 10.1126/science.1182143
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A basal alvarezsauroid theropod from the early Late Jurassic of Xinjiang, China
Jonah N Choiniere et al. Science..
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Abstract
The fossil record of Jurassic theropod dinosaurs closely related to birds remains poor. A new theropod from the earliest Late Jurassic of western China represents the earliest diverging member of the enigmatic theropod group Alvarezsauroidea and confirms that this group is a basal member of Maniraptora, the clade containing birds and their closest theropod relatives. It extends the fossil record of Alvarezsauroidea by 63 million years and provides evidence for maniraptorans earlier in the fossil record than Archaeopteryx. The new taxon confirms extreme morphological convergence between birds and derived alvarezsauroids and illuminates incipient stages of the highly modified alvarezsaurid forelimb.
Comment in
- Paleontology. Bird-dinosaur link firmed up, and in brilliant Technicolor.Stone R.Stone R.Science. 2010 Jan 29;327(5965):508. doi: 10.1126/science.327.5965.508.Science. 2010.PMID:20110471No abstract available.
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