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RE: the extracolumella
David Peters (DPeters@kupperparker.com) wrote:
<Is it the homolog of the quadratojugal?>
Most certainly not. It's present in cranes at least, other birds as Hope
suggests, snakes like *Dinilysia,* lizards like chameleons and geckoes,
among others. Apparently it's present in frogs (called the extrastapes),
and always as a form of hardened or semi-ossified cartilage. There is no
homology with animals having a quadratojugal but no extracolumella, or
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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