Re: Pygostylia and Oviraptorosauria

["David Marjanovic" <david.marjanovic@gmx.at>]

>   Only two definitions for Oviraptorosauria have been published.
> [...]
>   Sues, 1997 {*Oviraptor* + *Chirostenotes*}
>   Sereno, 1999 [sensu 2000] {*Oviraptor* <- Aves}

I see. Thanks! BTW, {*Oviraptor* > Neornithes} is Sereno, 1998 (his
rationale for phylogenetic nomenclature, in which he named Euornithes).

>   Barsbold, 1979a, b "*Oviraptor* <- *Ornithomimus*", as implied by
> taxonomy and phylogeny

Good he didn't explicitely write that, it would be the same as
Therizinosauridae sensu Sereno, 1998: {*Erlikosaurus* > *Ornithomimus*} and
include birds! :-)

> to
> define Oviraptorosauria as {*Oviraptor* <- *Ornithomimus*, Aves, or
> *Therizinosaurus*} which should please many people. *Velociraptor* and
> *Troodon* (or a suitable taxon that can actually be well-compared) may be
> added to further define the stem. A node-based clade to include segnosaurs
> and oviraptorosaurs, and a stem opposing oviraptorosaurs to include
> segnosaurs may be required.

Certainly good ideas. But I'm at the moment looking for published
definitions. So does somebody know about Pygostylia? :-)