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Middle cambrian arthropod embryos with blastomeres.
MedLine Citation:
PMID:  17793458     Owner:  NLM     Status:  PubMed-not-MEDLINE    
Abstract/OtherAbstract:
A phosphatized Middle Cambrian ( approximately 510 million years ago) fauna from Duyun, southern China, has yielded fossil embryos that may be of arthropod affinity and could belong to the co-occurring eodiscid trilobite Pagetia sp. The shell was most likely flexible and possessed at least two thin layers. Four embryos reveal blastomeres, and two embryonic stages are represented. These embryos demonstrate that the basic paradigm for the growth of the invertebrate embryo has not changed in more than half a billion years.
Authors:
X G Zhang; B R Pratt
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Science (New York, N.Y.)     Volume:  266     ISSN:  0036-8075     ISO Abbreviation:  Science     Publication Date:  1994 Oct 
Date Detail:
Created Date:  2010-06-08     Completed Date:  2010-07-02     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0404511     Medline TA:  Science     Country:  United States    
Other Details:
Languages:  eng     Pagination:  637-9     Citation Subset:  -    
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