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Re: Screaming dromaeosaur biplane killers of the air
Mickey Mortimer (Mickey_Mortimer111@msn.com) wrote:
<You said "enantiornithines, *Boluchia*, and basal ornithothoracines".>
And not once in this statement did I imply anything more than a series
of taxa. There was no continuity here, except the difference in furcular
form from that of *Archaeopteryx* and *Confuciousornis*. The relative
skeletal anatomy suggests parsimoniously that the furcula of *Boluochia*
would also be dissimilar, and its inclusion was not to imply the furcular
morphology, but as a taxon that I was sure was not enantiornithin, but
otherwise within more advanced-tailed and -winged birds. Nothing more. My
claim was on the form of the ramus and the attenuation towards the
symphysis with long hypocleidium. This has not changed.
<There are no Mesozoic ornithuromorphs with laterally grooved furculae,>
The caudolateral longitudinal groove of the furcula in some of these
forms is itself irrelevent, and may only be a consequence of the C- or
L-shaped ramal cross-section being turned on its axis.
<Do you think Iberomesornis is basal to the enantiornithine-euornithine
split, thus allowing non-enantiornithine, non-euornithine
ornithothoracines to exist?>
I didn't mention *Iberomesornis*. and I also sorta agree with de
Quierozx and Gauthier that, since the taxon was named in partial support
of the trunk anatomy, tyhat a single taxon should not be considered the
anchor, especially not *Iberomesornis*. Hell, I don't think
*Iberomesornis* should be the anchor of anything but Iberomesornithidae if
and only if another taxon is closer to it than other birds.
Jaime A. Headden
Little steps are often the hardest to take. We are too used to making leaps
in the face of adversity, that a simple skip is so hard to do. We should all
learn to walk soft, walk small, see the world around us rather than zoom by it.
"Innocent, unbiased observation is a myth." --- P.B. Medawar (1969)
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