Chen, Jun-Yuan and Oliveri, Paola and Li, Chia-Wei and Zhou, Gui-Qing and Gao, Feng and Hagadorn, James W. and Peterson, Kevin J. and Davidson, Eric H. (2000) Precambrian animal diversity: Putative phosphatized embryos from the Doushantuo Formation of China. Proceedings of the National Academy of Sciences of the United States of America, 97 (9). pp. 4457-4462. ISSN 0027-8424 http://resolver.caltech.edu/CaltechAUTHORS:CHEpnas00b
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Putative fossil embryos and larvae from the Precambrian phosphorite rocks of the Doushantuo Formation in Southwest China have been examined in thin section by bright field and polarized light microscopy. Although we cannot completely exclude a nonbiological or nonmetazoan origin, we identified what appear to be modern cnidarian developmental stages, including both anthozoan planula larvae and hydrozoan embryos. Most importantly, the sections contain a variety of small (<= 200 µm) structures that greatly resemble gastrula stage embryos of modern bilaterian forms.
|Additional Information:||Copyright © 2000 by the National Academy of Sciences. Contributed by Eric H. Davidson, January 28, 2000. We thank the many colleagues in the paleontology and evolution communities who have read, criticized, and thereby vastly improved drafts of this manuscript. This work was supported by the National Science Foundation, China, jointly with the National Department of Science and Technology of China; the National Science Council of Taiwan, China; the Fundamental Biology Research Program of the Life Sciences Division of NASA/Ames, Grant NAG2-1368; and the Norman Chandler Professorship at Caltech. J.W.H. was supported by Fellowships of the Division of Geological and Planetary Science of Caltech, and P.O. was supported by the Stowers Institute for Medical Research.|
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|Deposited On:||17 Dec 2007|
|Last Modified:||26 Dec 2012 09:48|
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