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Re: Pterosaur headcrest preservation by bacteria



Thank heavens, a post *not* about "Sauropodz r kewl".... 
And very interesting too. Thx.

--- On Tue, 4/17/12, Ben Creisler <bcreisler@gmail.com> wrote:

> From: Ben Creisler <bcreisler@gmail.com>
> Subject: Pterosaur headcrest preservation by bacteria
> To: dinosaur@usc.edu
> Date: Tuesday, April 17, 2012, 11:06 AM
> From: Ben Creisler
> bcreisler@gmail.com
> 
> 
> A new online paper:
> 
> 
> 
> Pinheiro, F.L., Horn, B.L.D., Schultz, C.L., de Andrade,
> J.A.F.G. and
> Sucerquia, P.A (2012)
> Fossilized bacteria in a Cretaceous pterosaur headcrest.
> Lethaia (advance online publication).
> DOI: 10.1111/j.1502-3931.2012.00309.x.
> http://onlinelibrary.wiley.com/doi/10.1111/j.1502-3931.2012.00309.x/abstract
> 
> 
> 
> We report herein the first evidence of bacterial
> autolithification in
> the Crato Formation of Araripe Basin, Brazil. The fossilized
> bacteria
> are associated with a tapejarid pterosaur skull, replacing
> the
> soft-tissue extension of the headcrest. EDS analyses
> indicate that the
> bacteria were replaced by phosphate minerals, probably
> apatite. The
> bacterial biofilm was likely part of the prokaryotic mat
> that
> decomposed the pterosaur carcass at the bottom of the
> Araripe lagoon.
> This work suggests that bacterial autolithification could
> have played
> a key-role on soft-tissue preservation of Crato Formation
> Lagerstätte.
>