Re: Sequential Centrosaurines, Batman!

["Andy Farke" <andyfarke@hotmail.com>]

> From: "Tim Williams" <twilliams_alpha@hotmail.com>
> Reply-To: twilliams_alpha@hotmail.com
> To: dinosaur@usc.edu
> Subject: Re: Sequential Centrosaurines, Batman!
> Date: Thu, 20 May 2004 10:08:30 -0500
>
> >   Of course, this is not to say that juveniles can't have features 
> diagnostic
> > to species (e.g., Nanotyrannosaurus/Tyrannosaurus), but just that 
> > ceratopsian juveniles often don't.
>
> _Avaceratops_ is based on what appears to be an immature specimen - but the 
> distinguishing characters are almost certainly diagnostic for the genus.

Absolutely. The squamosals on this taxon are particularly diagnostic. Still, 
I'll be very interested to see how things change once some of the funky new 
ceratopsids from Alberta, Montana, and other locales are properly described 
(referring to those now mentioned only in abstract form). Another case of 
WFTP. There's so much going on in ceratopsian phylogeny these days, it's 
hard to keep track!

Andy

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