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Re: Pterosaur feathers?
In a message dated 9/3/02 11:17:05 PM Pacific Daylight Time,
<< How about scutes? Why assume they evolved scutes>feathers>scutes, when
all you need is scutes>scutes. I don't pretend to know anything
scale/scute homology, but I see nothing so far that makes sauropod
spines any more "feathers" than iguana spines, or croc scutes. >>
How about just feathers > scutes (and pterosaur fur, and stegosaur plates,
and psittacosaur quills, and sauropod dermal structures, and ankylosaur
scutes)? Say feathers arose as hairlike dermal structures in Permian
prolacertiforms (might have been useful as insulation during glacial periods
then), then take it from there.