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Re: mammal definition (was "Fossil Discovery Threatens")



In a message dated 6/26/00 2:38:41 PM, jeffmartz@earthlink.net writes:

<< "Archosauria" has the same problem; Archosauria in the traditional

sense really means "Archosauriformes" in the phylogenetic definition set by

Gauthier, with the phylogenetic defintion of "Archosauria" now referring to

a much more restricted group, a problem caused, as with Mammalia by defining

it as a crown clade based on extant groups. >>

The problem is actually easy. Use different names when redefining things. If 
you're going to have to choose between saurapsida and reptillia, choose 
saurapsida, it's less confusing.

eric l.