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RE: again: frill of Triceratops

 From:  Jonathan  R. Wagner[SMTP:znc14@ttacs1.ttu.edu]

>  One I would favor is blood support for a keratin sheath.  Since
> Triceratops in particular had marginal hornlets, perhaps the entire
> frill was covered in horn.  Or maybe all of the vascularization was
> there to support the frill.
>        Wagner

Antlers on deer, moose and related species are a good example of this -
highly vaclularized to support growth, not thermoregulation.