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Re: Arms into wings

Tom Hopp writes, in part:

<more photographic evidence regarding the extent of wing feather   
brooding, to help us define it as a BASAL bird characteristic>

How can photographic evidence establish anything as a basal bird   
characteristic? All living birds have a carpometacarpus, but that's not a   
basal bird characteristic. _Archaeopteryx_ didn't have a carpometacarpus,   
for example, but is nonetheless within Aves.