[Taxacom] molecular clock critique from panbiogeography critique

[Dr. David Campbell]

Freshwater mollusks are another group in the Caribbean with curious, 
poorly understood biogeographic affinities that suggest that not all of 
Cuba and Jamaica were submerged.  


>(It gets tricky because so many clock studies are calibrated using the 
assumption that island endemics can be no older than their island).< 

This is only true of that subset of molecular clock studies that are 
calibrated...


-- 
Dr. David Campbell
425 Scientific Collections Building
Department of Biological Sciences
Biodiversity and Systematics
University of Alabama, Box 870345
Tuscaloosa AL 35487-0345  USA