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Evolutionary distance between X.laevis and A.mexicanum

James Hanken James.Hanken at COLORADO.EDU
Fri Jul 14 11:54:50 EST 1995

A good reference to recent studies of the phylogenetic relationships of 
Xenopus laevis, at least with respect to other frogs, is a paper by D.C. 
Cannatella and R.O. de Sa, 1993, Xenopus laevis as a model organism, 
Systematic Biology 42(4): 476-507. 

Regarding the relationship of Xenopus and the axolotl, that basically 
begs the question of the relationships between frogs and salamanders, 
about which there is little real consensus.  A recent issue of 
Herpetological Monographs, however, will be very helpful in assessing the 
problem from both paleontological and molecular perspectives: 
Herpetol. Monogr. no. 7, 1993, pp. 1-131.  This contains the proceedings 
of a symposium entitled "Amphibian relationships--phylogenetic analysis 
of morphology and molecules."

Good luck.



James Hanken                            
Department of Environmental, Population, and Organismic Biology
University of Colorado, Boulder, CO 80309-0334	
James.Hanken at Colorado.EDU     voice: 303-492-7185      fax: 303-492-8699

On Fri, 14 Jul 1995, Robert M. Grainger wrote:

> We are examining inductive mechanisms in Xenopus and the axolotl
> and would be grateful if someone might help us with information 
> about the approximate evolutionary distance between the two and
> references regarding this point.  Thanks for your help.

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