Re: feather tracts

["T. Mike Keesey" <tmk@dinosauricon.com>]

While working on a new 3D abelisaur, It occurred to me that the large
semiconical scutes of _Carnotaurus_ (which I used as a basis) pretty much
occur in "tracts". Large crocodylian scutes also occur in definite rows;
in fact when they project along the edge of the forelimb they can be
rather reminiscent of bird wings. Could there be a homologous relationship
between the patterns of large scutes in non-avian archosaurs and the
feather tracts of avians?

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T. MICHAEL KEESEY
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