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RE: Therizinosauroid apomorphies



On Wed, 5 Apr 2000, Thomas R. Holtz, Jr. wrote:

> A little quibble, "Therizinosauria" hasn't been phylogenetically defined,
> "therizinosaurs" has been...:
> 
> "Therizinosaurs may be defined as the aforementioned taxa [_Alxa._,
> _Enigmo._, _Erliko._, _Nanshiungo._, _Segno._, and _Therizinosaurus_ - TRH]
> and all others closer to them than to oviraptorosaurs, ornithomimids, and
> troodontids."  - Russell, 1997, Encyclopedia of Dinos, p. 730.

Oh yeah -- and here I thought the only blunders in the definition were the
use of multiple ingroups for a stem-based clade and use of supergeneric
outgroups. (I emended the whole thing to {_Therizinosaurus_ > _Oviraptor_,
_Ornithomimus_, _Troodon_} on my site.)

Well, does this make a difference? Should it?

-- T. Michael Keesey .................................. <tmk@dinosauricon.com>
   My Worlds (including The Dinosauricon) ... <http://dinosauricon.com/keesey>
   AOL Instant Messenger ........................................ <Ric Blayze>