| The oldest dinosaur? A Middle Triassic dinosauriform from Tanzania. | |
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MedLine Citation:
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PMID: 23221875 Owner: NLM Status: In-Data-Review |
Abstract/OtherAbstract:
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The rise of dinosaurs was a major event in vertebrate history, but the timing of the origin and early diversification of the group remain poorly constrained. Here, we describe Nyasasaurus parringtoni gen. et sp. nov., which is identified as either the earliest known member of, or the sister-taxon to, Dinosauria. Nyasasaurus possesses a unique combination of dinosaur character states and an elevated growth rate similar to that of definitive early dinosaurs. It demonstrates that the initial dinosaur radiation occurred over a longer timescale than previously thought (possibly 15 Myr earlier), and that dinosaurs and their immediate relatives are better understood as part of a larger Middle Triassic archosauriform radiation. The African provenance of Nyasasaurus supports a southern Pangaean origin for Dinosauria. |
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Authors:
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Sterling J Nesbitt; Paul M Barrett; Sarah Werning; Christian A Sidor; Alan J Charig |
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Publication Detail:
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Type: Journal Article Date: 2012-12-05 |
Journal Detail:
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Title: Biology letters Volume: 9 ISSN: 1744-957X ISO Abbreviation: Biol. Lett. Publication Date: 2013 |
Date Detail:
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Created Date: 2012-12-10 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 101247722 Medline TA: Biol Lett Country: England |
Other Details:
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Languages: eng Pagination: 20120949 Citation Subset: IM |
Affiliation:
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Burke Museum and Department of Biology, University of Washington, , Seattle, WA 98195, USA. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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