T. Michael Keesey wrote-
> So Tyrannoraptora is active, despite
> having an uncertain content (does it include compsognathids? Ornitholestes?
> arctometatarsalians?)
Does _Maniraptora_ include compsognathids? _Ornitholestes_? Tyrannosauroids?
Show me a clade with perfect stability of content, and I'll show you a part of the phylogenetic tree that no more than one researcher is working on. ;)
Mickey Mortimer