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RE: alula

On Mon, 7 Jun 1999, Bartlema, Lauri, L. wrote:

> Having done a paper on Enantiornithes for an ornithology seminar last
> semester, I had also wondered if the alula had evolved twice.  Did the
> Enanti's and the Neornithes independently develop this structure, or does
> the presence of the alula suggest some as yet unknown link between the two
> groups?

Presumably it evolved in some ancestor of Ornithothoraces (Enantiornithes
+ Ornithurae, the latter including Neornithes) above Confuciusornithidae,
right?

--T. Mike Keesey                                    <tkeese1@gl.umbc.edu>
WORLDS                                  <http://www.gl.umbc.edu/~tkeese1>