RE: Definitions

[Steven Mahon <floridamahon@yahoo.com>]

--- "Thomas R. Holtz, Jr." <tholtz@geol.umd.edu>
wrote:
> > From: owner-dinosaur@usc.edu
> > > Sauropodomorpha is _Cetiosaurus_ and everything
> > > closer to it than to Aves
> > > (Padian et al. 1999) OR _Plateosaurus_,
> > > _Saltasaurus_, their most recent
> > > common ancestor, and all of its descendants
> > > (Sereno).
> >
> > I thought it was Saltasaurus > Aves? Is there
> > something I'm missing?!
> 
> Sereno 1997, 1998, and 1999, and Wilson and Sereno
> 1998, are all pretty
> clear in using a node-based definition.

Does that mean the node-based has priority? On Mike's
old site, it says "sensu Gauthier 1986 (Saltasaurus >
Neornithes). 

> D'OH!! Yeah, Gauthier 1986, where Dinosauria is the
> clade that contains
> Herrerasauridae, Ornithischia, Sauropodomorpha, and
> Theropoda. Note that
> this paper was developed prior to the literature on
> phylogenetic taxonomy,
> so some of the clades are not given a formulaic
> definition. Therefore, we
> can't tell if this is a node-based or stem-based
> group.  (Incidentally,
> following this version of Dinosauria and the
> then-accepted hypothesis that
> herrerasaurids were outside the remaining dinosaurs,
> Novas named
> "Eudinosauria" for Ornithichia + Saurischia.)

Does that have priority then over Dinosauria (Padian &
May 1993)? Or was that afterwards?

        Thanks Again,
          Steven Mahon

 


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