RE: Gaia theropod follow-up: a "new" phylogeny

["Jerry D. Harris" <dinogami@hotmail.com>]

> You
> can't have an ancestor after its kin.

  Why not?  Just because a species speciates (producing a daughter species) 
doesn't necessarily mean that the parent species becomes extinct.  It can, 
in fact, persist even beyond the span of the daughter species (and, of 
course, continue to produce new daughter species along the way).

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Jerry D. Harris
Dept of Earth & Environmental Science
University of Pennsylvania
240 S 33rd St
Philadelphia PA  19104-6316
Phone: (215) 573-8373
Fax: (215) 898-0964
E-mail: jdharris@sas.upenn.edu
and     dinogami@hotmail.com
http://www.sas.upenn.edu/~jdharris

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