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Re: Clade II



martz@holly.ColoState.EDU wrote: 

>Species do not naturally aggregate themselves into "groups".

Nor do individuals and populations of individuals naturally aggregate
themselves into "groups" (which we tend to call "species," "subspecies,"
"varieties," and so forth). There are no "natural groups" beyond the flexible
boundaries of a given population.

Caitlin R. Kiernan