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Re: altricial nestling bone fossilization

I'll reply with a question: are you considering mostly fully altricial species, 
or would semialtricial species like herons be included?  (this seems relevant 
largely because of body size issues).

--Mike Habib

Thank you, Mike.

I'm interested in rates and degrees of ossification in tetrapods that enter 
this world essentially helpless. Unable to feed or defend themselves. And those 
that grow fast, within a few weeks or a season. Do their bones show delayed 
ossification, perhaps because 'soft' bones grow faster than hard ones do? I'm 
in the dark here and need a bit of guidance with regards to extant tetrapods. 
However, placentals I think I understand. If you have information on herons, 
I'd be very glad to hear it. What would also be intriguing is how long thin 
bones, such as heron or flamingo tibiae and metatarsals grow. 

David Peters
St. Louis

----- Original Message -----
From: david peters <davidrpeters@earthlink.net>
Date: Monday, October 11, 2004 8:50 am
Subject: altricial nestling bone fossilization

> To my question, I recently received the following answer from a 
> noted bird expert at a major metropolitan museum (name withheld 
> 'cause why should I drag him/her into this?). 
> Q: Are altricial nestling bird bones sufficiently ossified to 
> fossilize?
> A: At later stages they might be under favorable conditions.
> Still waiting for an answer from my bat expert. Not sure what the 
> situation would be with dependent marsupial young. Any thoughts, 
> references or discussion along these lines would be appreciated.
> David Peters
> St. Louis