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The last common bilaterian ancestor

Erwin, Douglas H. and Davidson, Eric H. (2002) The last common bilaterian ancestor. Development, 129 (13). pp. 3021-3032. ISSN 0950-1991.

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Many regulatory genes appear to be utilized in at least superficially similar ways in the development of particular body parts in Drosophila and in chordates. These similarities have been widely interpreted as functional homologies, producing the conventional view of the last common protostome-deuterostome ancestor (PDA) as a complex organism that possessed some of the same body parts as modern bilaterians. Here we discuss an alternative view, in which the last common PDA had a less complex body plan than is frequently conceived. This reconstruction alters expectations for Neoproterozoic fossil remains that could illustrate the pathways of bilaterian evolution.

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Additional Information:© 2002 The Company of Biologists Limited. Accepted 11 April 2002. We thank Drs David Bottjer, R. Andrew Cameron, Kevin J. Peterson and Ellen Rothenberg for discussions and review of the manuscript. NASA’s National Astobiology Institute and the Thaw Charitable Trust through the Santa Fe Institute provided funding to D.H.E. and NASA/Ames (NAG 2-1368) Fundamental Space Biology Program to E.H.D.
Funding AgencyGrant Number
Thaw Charitable TrustUNSPECIFIED
Santa Fe InstituteUNSPECIFIED
NASANAG 2-1368
Subject Keywords:Protostome-deuterostome ancestor, Metazoan phyla, Developmental evolution, Gene regulation, Conserved sequences
Issue or Number:13
Record Number:CaltechAUTHORS:ERWdev02
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:12099
Deposited By: Archive Administrator
Deposited On:23 Oct 2008 06:06
Last Modified:03 Oct 2019 00:25

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