[bionet.molbio.evolution] Divergence times

revel@genbank.BIO.NET (Jean-Paul Revel) (08/11/90)

Can anyone help me with a good general reference for divergence times?
In particular I am looking for a divergence times for frogs (Xenopus),
birds
(chicken), and rodents (rats). 

Thanks

Jan Hoh
jhoh@citromeo.bitnet