Re: Therizinosauria Cladogram

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

There is no "Alxasauroidea", as _Therizinosauroidea_ specifically
includes _Alxasaurus_.

I believe the definitions are something like so:
Therizinosauria = (Therizinosaurus <-- Oviraptor, Ornithomimus, Troodon)
Therizinosauroidea = (Alxasaurus + Therizinosaurus)
Alxasauridae = (Alxasaurus <-- Therizinosaurus)
Therizinosauridae = (Therizinosaurus <-- Alxasaurus)

It may also be possible to define Therizinosaurinae as
Clade(_Enigmosaurus_ + _Erlikosaurus_ + _Nanshiungosaurus_ + _Segnosaurus_
+ _Therizinosaurus_). Not sure whether this is a good idea or not, though.

So, with the names correctly applied:

Therizinosauria (=Segnosauria, Segnosaurischia)
|--Beipiaosaurus
`--Therizinosauroidea
   |--Alxasauridae
   |  `--Alxasaurus
   `--Therizinosauridae
      |--Nothronychus
      `--(Therizinosaurinae)
         |--Enigmosaurus
         |--Erlikosaurus
         |--Nanshiungosaurus
         |--Segnosaurus
         `--Therizinosaurus

I hadn't heard that "therizinosaurine" interrelationships had been figured
out -- I thought there wasn't enough overlapping material. I'd like to
know your basis for creating a Therizinosaurini with _Nanshiungosaurus_
and _Therizinosaurus_.

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