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Re: The Kosmoceratops-Utahceratops cladogram



On Wed, Sep 22, 2010 at 1:19 PM, Thomas R. Holtz, Jr. <tholtz@umd.edu> wrote:
>
> As PLoS ONE's figure and pdf server are currently down, for those who just
> can't wait for the phylogenetic punchline, here it is:
>
> Ceratopsidae
> |--Centrosaurinae
> `--Chasmosaurinae
> Â |--Chasmosaurus
> Â | Â|--Chasmosaurus belli
> Â | Â`--Chasmosaurus russelli
> Â `--+--Mojoceratops perifania
> Â Â Â`--+--Agujaceratops mariscalensis
> Â Â Â Â `--+--+--Pentaceratops sternbergii
> Â Â Â Â Â Â| Â`--Utahceratops gettyi
> Â Â Â Â Â Â`--+--Coahuilaceratops magnacuerna
> Â Â Â Â Â Â Â `--+--+--Kosmoceratops richardsoni
> Â Â Â Â Â Â Â Â Â| Â`--Vagaceratops irvinensis
> Â Â Â Â Â Â Â Â Â`--+--Anchiceratops orantus
> Â Â Â Â Â Â Â Â Â Â `--+--Arrhinoceratops brachyops
> Â Â Â Â Â Â Â Â Â Â Â Â`--+--Eotriceratops xerinsularis
> Â Â Â Â Â Â Â Â Â Â Â Â Â |--Ojoceratops fowleri
> Â Â Â Â Â Â Â Â Â Â Â Â Â `--+--+--Torosaurus latus
> Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â| Â`--Torosaurus utahensis
> Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â`--+--Nedoceratops hatcheri
> Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â `--+--Triceratops horridus
> Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â`--Triceratops prorsus
>
> Or, depending how lumpy you want it, the last 5 species can be "Triceratops
> horridus"...

Thanks!

So ... why three new generic names when it seems like only one is
needed (i.e., why not Pentaceratops gettyi and either Vagaceratops
richardsoni or Kosmoceratops irvinensis)?

-- 
T. Michael Keesey
Technical Consultant and Developer, Internet Technologies
Glendale, California
http://tmkeesey.net/