Choanoflagellates

Dr. Dennis Goode GOODE at ZOOL.UMD.EDU
Fri Jun 3 12:57:58 EST 1994


 
From:     <ZOOL/GOODE>
To:       protista at net.bio.net
Subject:  Choanoflagellates 
Date:     Fri, 3 Jun 1994 13:20:08

I'm doing the final version of a review on the origins of 
multicellularity in the protists, and among other things, I'm 
supporting the hypothesis that the extant choanoflagellates and the 
animals share a choanoflagellate-like ancester.  Many cytological and 
physiological features, as well as the recent rDNA sequence data 
(Wainwright, Hinkle, Sogen, and Stickel, Science 260:340 '93) support 
that hypothesis. Other than some peoples suggestions that other 
groups such as the ciliates or Volvocales might have given rise to 
the animals and that some important animal features such as meiosis 
and sex have not been reported in choanos to my knowledge, do any of 
you know any good (or even not so good) arguments against the choanos 
being our (the animals) immediate cousins?




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