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Re: Avialian synapomorphies

>_Longisquama insignis_ has a furcula. _Allosaurus fragilis_ also has a
>furcula, long misidentified as an abdominal rib. Furculae may be primitive
>for Theropodomorpha.

Do you happen to have references for the presence of this stucture handy?


cnedin@geology.adelaide.edu.au                  nedin@ediacara.org
Many say it was a mistake to come down from the trees, some say
the move out of the oceans was a bad idea. Me, I say the stiffening
of the notochord in the Cambrian was where it all went wrong,
it was all downhill from there.