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Re: Feathers on Bloody Everything



OK, Josh - I agree that there shouldn't be REAL FEATHERS on every dinosaur,
however, I like with the idea that proto-feathers of some sort might be on
every dinosaur - unless converted into real feathers or other structures
(such as George suggests).

    Also, I had posted previously that Jack Horner once said that he thought
that all dinos had downy feathers, which they lost as they grew older.  (He
didn't specify ALL, but he implied it.  This was back around 1986 - over
pizza and beer in New Jersey).

    Allan Edels

-----Original Message-----
From: Joshua Smith <smithjb@sas.upenn.edu>
To: dinosaur@usc.edu <dinosaur@usc.edu>
Date: Tuesday, October 06, 1998 12:18 PM
Subject: Feathers on Bloody Everything


>
>Allan Edels wrote:
>>
>> I tend to agree with you on this George.
>>
>> In a message dated 10/5/98 7:57:50 PM EST, jjackson@interalpha.co.uk
writes:
>>
>> << Wait until the ?feathers? turn out to be Caudipteryx style feathers;
>> Sinosauropteryx style feathers aren?t feathers at all. >>
>>
>> Actually, I kinda expect "Sinosauropteryx style feathers" to be on all
>> dinosaurs, unless secondarily lost or converted into stuff like stegosaur
>> plates, keeled scutes, spines, etc.
>>
>
> GROAN.  Now every bloody artist who hasn't done it before it
>going to put feathers on every critter out there.  Thanks, George.  I am
>as excited about all of this feather stuff as the next guy, particularly
>where I have been sitting rather firmly on the fence as far as avian
>origins are concerned for a long while.
>
> Now everyone is going to toat parsimony in defense of putting
>feathers on EVERYTHING.  At the risk of sounding like a broken record,
>parsimony is an untested assumption, and systems violate it constantly.
>We need to be careful in painting it across the canvas in a single swatch
>of color.  Just because we have feathers in one clade, doesn't
>necessarilly mean that we are going to find them in all of them.  I will
>use the evidence that we have that physiology is not constant within and
>across the entire Dinosauria as support of that last statement.  I am
>going to kick the first person I see who draws a downy stegasaur.  Just
>don't go too too crazy, OK?
>
> Here is an interesting hypothesis that isn't new but that a few
>of us were kicking around on the 10th floor of the Cliff the other night:
>What if feathers (downy junk, not "real") are ontogenetic for some
>theropods.  Juvenile feathered allosaurs?  Wow.  Both Holtz and I think
>that hypothesis kicks a lot of ass.
>
>
>--
>__________________________
>Josh Smith
>University of Pennsylvania
>Department of Earth and Environmental Science
>471 Hayden Hall
>240 South 33rd Street
>Philadelphia, PA  19104-6316
>(215) 898-5630 (Office)
>(215) 898-0964 (FAX)
>smithjb@sas.upenn.edu
>
>