[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index][Subject Index][Author Index]

Re: feathers

I do not think thecodont and therapsid families were that close to have
a common ancestor. You remember that therapsids first had hair. Plus, if
the ancestor had hair, a insulating biomechanism, wouldn't *all* of the
descendants keep the trait?
Gregory S. Jensen wrote:
> Is it possible hair preceded feathers?  I know hair usually isn't on the
> dinosaur line, but remember pterosaurs allegedly had hair.  I wonder if it's
> possible that synapsids and thecodonts could have had a common ancestor with
> some kind of hair.  It's much easier to see a hair evolving into a feather
> than a scale.