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On Tue, 30 Mar 1999 21:41:42 -0500 "Patrick Norton"
> And since _Mononykus_ (a member of the
>Alvarezsauridae) has a carpometacarpus (at least it looks like one to
me), is it >reasonable
>consider the carpometacarpus as a basal character for the Metornithes?
>not, what are the members of Aves outside Metornithes that show fusion
>bones in the wrist or hand?
*Avimimus*, while not usually considered to be a member of Aves, is
reported to have fusion of the wrist and hand bones. In *The
Dinosauria*, there is on page 285 (paperback) a drawing of the relevant
elements, and the condition is described as a carpometacarpus. So, this
character may go back farther than Aves, if this interpretation is
correct (and if *Avimimus* isn't a secondarily-flightless member of
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