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RE: Ceratopsine phylogeny questions
> From: owner-DINOSAUR@usc.edu [mailto:owner-DINOSAUR@usc.edu]
> On Behalf Of Michael Erickson
> Tim Williams wrote:
> > So "genera" such as _Brachyceratops_ and _Monoclonius_ are
> regarded as
> > nomina dubia
> Hate to be a party crasher here, but Dodson (1992) showed
> that _Monoclonius_ was a vlid genus. _Brachyceratops_,
> however, is indeed a jeuvenile of some other centrosaurine,
> probably _Styracosaurus_.
> Dodson, Peter (1992). On the status of the ceratopsids
> _Monoclonius_ and _Centrosaurus_. In: Dinosaur systematics:
> Approaches and Perspectives. Cambridge University Press. pp.
> 231 - 245. ISBN 0521438100.
Not universally accepted by any means, in light of more recent discoveries
of centrosaurine populations.
> > On that basis, _A. ajax_ would be regarded as a nomen dubium. This
> > would render>_Brontosaurus_ a valid genus,
But Iff that basis (that juveniles weren't acceptable as types, which they
currently are) were accepted. Sad to say, the case for _Brontosaurus_ is not
Thomas R. Holtz, Jr.
Email: email@example.com Phone: 301-405-4084
Office: Centreville 1216
Senior Lecturer, Vertebrate Paleontology
Dept. of Geology, University of Maryland
Faculty Director, Earth, Life & Time Program, College Park Scholars
Faculty Director, Science & Global Change Program, College Park Scholars
Mailing Address: Thomas R. Holtz, Jr.
Department of Geology
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University of Maryland
College Park, MD 20742 USA