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How different are the Burgess Shale fauna in terms of topology? I can't think off hand of anything really radical in terms of deviating from the tube with a mouth and optional anus.
This is arguably true, leaving aside the dubious term 'traits', in as much as there is significant evidence of the transfer of mitochondrial DNA to the nuclear genome (Woischnik and Moraes, 2002).
This message has been edited by Wounded King, 06-07-2005 05:33 AM
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