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Re: Dinosaur beaks



HP Jaime Headden wrote: 
 
> <it would be easily derived that this basal bird would have had a much 
> larger rhomphotheca in general, relative to other basals... Hence, a 
> higher degree of preservation.> 
>  
>   How so? Of the hundred or so catalogued *Confuciusornis*, only two or 
> three are known to heave ANY rhamphotheca. 
 
OK, that's it. That's what falsifies my argument that because all of the 
several specimens of *Archaeopteryx* and *Microraptor* preserve claw 
sheaths, they should preserve rhamphothecae, too. 

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