| Phylogenetic evidence for early hemochorial placentation in eutheria. | |
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MedLine Citation:
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PMID: 19800685 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The eutherian placenta is remarkable for its structural and functional variability. In order to construct and test comparative hypotheses relating ecological, behavioral and physiological traits to placental characteristics it is first necessary to reconstruct the historical course of placental evolution. Previous attempts to do so have yielded inconsistent results, particularly with respect to the early evolution of structural relationships between fetal and maternal circulatory systems. Here, we bring a battery of phylogenetic methods - including parsimony, likelihood and Bayesian approaches - to bear on the question of placental evolution. All of these approaches are consistent in indicating that highly invasive hemochorial placentation, as found in human beings and numerous other taxa, was an early evolutionary innovation present in the most ancient ancestors of the living placental mammals. |
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Authors:
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M G Elliot; B J Crespi |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't Date: 2009-10-02 |
Journal Detail:
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Title: Placenta Volume: 30 ISSN: 1532-3102 ISO Abbreviation: Placenta Publication Date: 2009 Nov |
Date Detail:
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Created Date: 2009-11-02 Completed Date: 2010-01-07 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 8006349 Medline TA: Placenta Country: England |
Other Details:
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Languages: eng Pagination: 949-67 Citation Subset: IM |
Affiliation:
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Department of Biological Sciences, Simon Fraser University, Burnaby, British Columbia, Canada V5A 1S6. micke@sfu.ca |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Animals Bayes Theorem Evolution* Female Humans Likelihood Functions Mammals / genetics* Phylogeny Placenta / physiology Placentation / genetics, physiology* Pregnancy |
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