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Nigersaurus and the beaks



Yes, 
as Mike says, Bonitasaura also had a keratinooous
sheath that covered the cheeks (Jeff does not
necessarily agree with this). We can or not consider
this as a beak? Not sure, but it was a ramphoteca
anyway. You can see the notice here:
http://www.ingentaconnect.com/content/klu/114/2004/00000091/00000010/art00006
and reconstructions like in the original publication:
http://www.dinosaur.net.cn/museum/Bonitasaura.htm
or by Gabriel Lio:
http://www.dinosaur-world.com/weird_dinosaurs/bonitasaura_salgadoii.htm
However, I agree in that the material in Nigersaurus
is beautiful and astonishing.
All the Best. 
Sebastian


 
--- "T. Michael Keesey" <keesey@gmail.com> escribió:

> On Nov 15, 2007 5:36 PM, Dann Pigdon
> <dannj@alphalink.com.au> wrote:
> > Here's the full paper:
> >
> >
>
http://www.plosone.org/article/info%3Adoi%2F10.1371%2Fjournal.pone.0001230
> >
> > This seems to the be the closest any known
> sauropod came to developing a
> > beak.
> 
> Don't forget _Bonitasaura_, of the keratinous
> cheeks.
> 
> -- 
> Mike Keesey
> 


Lic. Sebastián Apesteguía

Área de Paleontología. Fundación de Historia Natural 'Félix de Azara',
Dto. de Ciencias Naturales y Antropología, CEBBAD, Univ.Maimónides, 
V. Virasoro 732 (1405), Buenos Aires, ARGENTINA
Tel-fax: 5411-49051100 i. 1228, secretaria@fundacionazara.org.ar 
www.fundacionazara.org.ar

Sección de Paleontología de Vertebrados 
Museo Argentino de Ciencias Naturales 'B. Rivadavia'
Av. Ángel Gallardo 470 (1405) Buenos Aires, ARGENTINA
Tel-fax:5411-49826595 i.193, paleoninja@yahoo.com.ar


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