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Re: Ceratops (was RE: Glishades ericksoni, ...)

T. Michael Keesey wrote:
> On Thu, May 13, 2010 at 6:25 PM, Thomas R. Holtz, Jr. <tholtz@umd.edu>
> wrote:
>> It depends on what the agreed upon definition of Ceratopsidae is to be.
>> If
>> it is (for example) Centrosaurus + Chasmosaurus, than Ceratops might
>> well
>> be a non-ceratopsid. If instead Ceratopsidae is defined as Ceratops +
>> Centrosaurus + Chasmosaurus, than it would be included by definition,
>> but
>> might be outside Chasmosaurus > Centrosaurus and Centrosaurus >
>> Chasmosaurus.
> Probably the best solution, since both relevant nomenclatural codes
> (ICZN and the draft PhyloCode) require Ceratops montanus to be within
> Ceratopsidae by definition. It does have one little drawback, and
> that's that it potentially leaves Clade(Centrosaurus + Chasmosaurus)
> without a name.
Only until someone names it...

Thomas R. Holtz, Jr.
Email: tholtz@umd.edu   Phone: 301-405-4084
Office: Centreville 1216
Senior Lecturer, Vertebrate Paleontology
Dept. of Geology, University of Maryland
Fax: 301-314-9661

Faculty Director, Earth, Life & Time Program, College Park Scholars
Faculty Director, Science & Global Change Program, College Park Scholars
Fax: 301-314-9843

Mailing Address:        Thomas R. Holtz, Jr.
                        Department of Geology
                        Building 237, Room 1117
                        University of Maryland
                        College Park, MD 20742 USA