Re: Therizinosauria Cladogram

["T. Mike Keesey" <tmk@dinosauricon.com>]

On Fri, 11 Jan 2002 Dinogeorge@aol.com wrote:

> In a message dated 1/11/02 2:51:15 PM EST, tmk@dinosauricon.com writes:
>
> << But how can you be sure that they're synonyms if Segnosauria was never
>  defined? >>
>
> Segnosauria was defined when its members were listed. That is one of several
> ways to define a taxon.

Well, then it is different than _Therizinosauria_, since it couldn't have
included _Alxasaurus_ or _Beipiaosaurus_ or _Nothronychus_, etc.

Membership does not equal definition, anyway.

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