期刊
SCIENCE
卷 326, 期 5959, 页码 1530-1533出版社
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.1180350
关键词
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资金
- National Geographic Society [8014-06]
- David Clark Inc.
- Jean Butz Memorial Fund
- Theodore Roosevelt Memorial Fund
- Jurassic Foundation
- Explorers Club Exploration Grant
- NSF
- Samuel & Doris Welles Research Fund
- Bryan Patterson Memorial Grant
- University of California-Berkeley Department of Integrative Biology
- University of Utah
- Systematics Research Fund
Characterizing the evolutionary history of early dinosaurs is central to understanding their rise and diversification in the Late Triassic. However, fossils from basal lineages are rare. A new theropod dinosaur from New Mexico is a representative of the early North American diversification. Known from several nearly complete skeletons, it reveals a mosaic of plesiomorphic and derived features that clarify early saurischian dinosaur evolution and provide evidence for the antiquity of novel avian character systems including skeletal pneumaticity. The taxon further reveals latitudinal differences among saurischian assemblages during the Late Triassic, demonstrates that the theropod fauna from the Late Triassic of North America was not endemic, and suggests that intercontinental dispersal was prevalent during this time.
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