Re: From Science New, and more

["Tim Donovan" <msdonovan66@hotmail.com>]

> From: "Steven Coombs" <gasperex@hotmail.com>
> Reply-To: gasperex@hotmail.com
> To: dinosaur@usc.edu
> CC: gasperex@hotmail.com
> Subject: Re: From Science New, and more
> Date: Mon, 11 Nov 2002 17:19:40 -0500
>
> > From: "Tim Donovan" <msdonovan66@hotmail.com>
> > Reply-To: msdonovan66@hotmail.com
> > To: jbois@umd5.umd.edu, dinosaur@usc.edu
> > Subject: Re: From Science New, and more Date: Mon, 11 Nov 2002 07:19:08 
> > -0500
>
> >   Right. Note the loss of some diversity about 2 million years before the 
> > end, which suggests another factor causing a preliminary extinction.
>
>
> I thought it was 10 million years, I don't remember where I heard that, 
> someone please correct me if I'm wrong.

  There was some loss of diversity by the early Maastrichtian. 
Pachyrhinosaurus, for example, was the only centrosaurine genus left by 
then. But the saurolophines and centrosaurines didn't disappear entirely 
until the Lancian period, when lambeosaurs were also virtually gone.



> Steven Coombs
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