Re: Arctometatarsalia and Alvarezsauria

["Mickey Mortimer" <Mickey_Mortimer111@msn.com>]

Jaime Headden wrote-

>   Mike Keesey adds a very nice hyper-arctomet pes refered to
> *Ornithomimus* as *O. minutus*, but this is a mononykine. So there are
> remains of two NA mononykes presently.

One more element can be referred to a North American mononykine too-

Buckley and Ott, 2001. A new specimen of alvarezsaurid from the Late
Cretaceous Hell Creek Formation. JVP 21(3) 36A-37A.
A third metatarsal from a mononykine alvarezsaurid, discovered in the Hell
Creek Formation (Late Maastrichtian) of Montana.  It's similar to Mononykus,
but not as laterally compressed in the middle and has a sharper plantar
ridge.  It would be interesting to compare to "Ornithomimus" minimus.  Those
who want a photo, ask offlist.

Mickey Mortimer