Re: paleonet Early NA hadrosaur specimens??

[Judith Harris <harrisj@xxxxxxxxxxxx>]

The hadrosaur from California that I mentioned the other day is  
Maastrichtian so no competition there. Found amongst many petering- 
out forms.

Judith Harris

On Jun 24, 2005, at 7:37 AM, Mike Everhart wrote:

> All,
> Since the recent discovery of hadrosaur remains (scrap) in the  
> Smoky Hill Chalk
> http://www.oceansofkansas.com/New-dino.html
>
> ...I've been trying to find other records of contemporary or older  
> specimens for comparison. I came across a comment by Donald Glut  
> (1972) that suggested that Marsh's specimen of "/Claosaurus/ has  
> the distinction of being the oldest known hadrosaur of North  
> America." Carpenter, et al. (1995) noted that "because of it's age,  
> this animal has come to take on an important role in the phylogeny  
> of these dinosaurs..." (citing Lull and Wright, 1942, and Ostrum,  
> 1961).
>
> The new specimen may be as much as 2 million years older... (Upper  
> Coniacian vs. Lower Campanian)
>
> I would appreciate any information / suggestions regarding more  
> recent references to early hadrosaurs from North America.
>
> Regards,
>
> Mike Everhart
> Adjunct Curator of Paleontology
> Sternberg Museum of Natural History
> Fort Hays State University, Hays, KS
> www.oceansofkansas.com
>
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