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Re: "Megapnosaurus" says farewell...

In a message dated 2/4/02 5:09:11 PM Pacific Standard Time, 
dinoland@lycos.com writes:

<< I have never quite understood why _Psittacosaurus_ has something like 
seven or eight valid species, but _Coelophysis_, _Syntarsus_ (Raath), 
_Eucoelophysis_, etc. were placed in separate genera.  It's aesthetic 
philosophy, not science sensu stricto. >>

So far nobody has been able to come up with a consistent way to group 
together the various species of Psittacosaurus. You either have x species or 
x genera. They all look enough alike that the species level is considered 
more appropriate.