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RE: eggshells, therizinosaurs & tyrannosaurs
On Wed, 19 Jul 2000, Ken Kinman wrote:
> >You mean "sensu Sereno". Maniraptora sensu stricto is "modern birds and all
> >taxa closer to modern birds than to Ornithomimidae": see Gauthier 1986.
> I just meant that Maniraptora "sensu Sereno" is "sensu stricto" (in the
> least inclusive sense), whereas "sensu Gauthier" would be sensu lato (a more
> inclusive sense, at least using Sereno's phylogeny).
> Sereno does not seem to follow Gauthier's definition of Maniraptora,
> and instead uses a new clade name, Tyrannoraptora.
Actually, Tyrannoraptora is a node-defined group (_Tyrannosaurus_ +
Neornithes), while Maniraptora is stem-defined (Neornithes <--
Tyrannoraptora may be a subclade of Maniraptora, or it may be a junior
heterodefinitional synonym of Maniraptoriformes, or it may include
Maniraptoriformes. I've seen phylogenies all three ways.
> Apparently another case of cladistic disunity on what definitions to
According to my observations, Sereno doesn't have much respect for
priority (even his own), eponymity, or the possibility that someone else's
phylogeny might be more correct.
T. Michael Keesey <firstname.lastname@example.org> | AIM <Ric Blayze> | ICQ <77314901>
My Worlds <http://dinosauricon.com/keesey>
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