[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index][Subject Index][Author Index]

Re: DEFENDING MODERN BIOLOGY



On Wed, 21 Jun 2000, Ken Kinman wrote:

>       Thecodontia is a paraphyletic group, not a polyphyletic "trash-can".  
> And cladists create paraphyletic groups all the time, but just don't realize 
> it (or admit it), because they apparently believe speciation is actually a 
> sister-sister splitting process, rather than a mother-daughter budding 
> process.

But what's the utility of a group that includes _Pseudolagosuchus_ with
_Drepanosaurus_, but not with _Eoraptor_; that includes _Poposaurus_ with
_Rhynchosaurus_, but not with _Sphenosuchus_; that includes
_Sharovipteryx_ with _Aetosaurus_, but not with _Eudimorphodon_; etc.?

____________________________________________________________________________
T. Michael Keesey <tmk@dinosauricon.com> | AIM <Ric Blayze> | ICQ <77314901>
                 My Worlds <http://dinosauricon.com/keesey>
                 The Dinosauricon <http://dinosauricon.com>