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Science 15 November 1996:
Vol. 274. no. 5290, pp. 1164 - 1167
DOI: 10.1126/science.274.5290.1164
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Reports
Early Adaptive Radiation of Birds: Evidence from Fossils from
Northeastern China
Lianhai Hou,
Larry D. Martin,
Zhonghe Zhou,
Alan Feduccia
*
Late Jurassic and Early Cretaceous birds from northeastern China,
including many complete skeletons of Confuciusornis, provide evidence for a fundamental dichotomy in the class Aves that may antedate the temporal occurrence of the Late Jurassic
Archaeopteryx. The abundance of Confuciusornis
may provide evidence of avian social behavior. Jurassic skeletal
remains of an ornithurine bird lend further support to the idea of an
early separation of the line that gave rise to modern birds.
Chaoyangia, an ornithurine bird from the Early Cretaceous of
China, has premaxillary teeth.
L. Hou, Institute of Vertebrate Paleontology and Paleoanthropology
(IVPP), Chinese Academy of Sciences, Post Office Box 643, Beijing
100044, China.
L. D. Martin, Natural History Museum, University of Kansas, Lawrence,
KS 66045, USA.
Z. Zhou, IVPP, Chinese Academy of Sciences, Post Office Box 643, Beijing 100044, China, and Natural History Museum, University of
Kansas, Lawrence, KS 66045, USA.
A. Feduccia, Department of Biology, University of North Carolina,
Chapel Hill, NC 27514, USA.
*
To whom correspondence should be addressed.
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