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Re: feathers arising
LN Jeff Martz wrote:
>Alan Brush wrote:
>> The ANALOGY is that feathers are molted annually, just as reptilian
>> skin is. This is NOT growth (in the sense of increased size). I suspect
>> that feather moult and reptilian sking molt is analogous, and may be
>> homologous. Apparently physiologically the mechanisms are very similar.
> I thought that only snakes and lizards shedded thier skins. Do
>crocodilains do this as well?
All reptiles shed their skins. Whereas most (turtles, crocs, birds) shed it
a piece at a time, lepidosaurs (tuataras and squamates) shed most of it at
Thomas R. Holtz, Jr.
Vertebrate Paleontologist Webpage: http://www.geol.umd.edu
Dept. of Geology Email:email@example.com
University of Maryland Phone:301-405-4084
College Park, MD 20742 Fax: 301-314-9661
"There are some who call me... Tim."
-- Tim the Enchanter, "Monty Python and the Holy Grail"
---------- subtitle --[Monty Python ik den Holy Grailen]
"Tim?!? They called me TIM?!?!"
-- Tom the Paleontologist, on seeing "The Ultimate Guide to T. rex" :-)