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RE: Heterodontosaurus cranial anatomy described




----- Mensaje original -----
De: bh480@scn.org <bh480@scn.org>
Enviado: viernes, 20 de mayo de 2011 19:50
Para: dinosaur@usc.edu
Asunto: Heterodontosaurus cranial anatomy described

From: Ben Creisler
bh480@scn.org

In advance papers for Zoological Journal of the Linnean Society: 

DAVID B. NORMAN, ALFRED W. CROMPTON, RICHARD J. BUTLER, LAURA B. PORRO and
ALAN J. CHARIG (2011)
The Lower Jurassic ornithischian dinosaur Heterodontosaurus tucki Crompton
& Charig, 1962: cranial anatomy, functional morphology, taxonomy, and
relationships.
Zoological Journal of the Linnean Society (advance online publication)
DOI: 10.1111/j.1096-3642.2011.00697.x
http://onlinelibrary.wiley.com/doi/10.1111/j.1096-3642.2011.00697.x/abstract

The cranial anatomy of the Lower Jurassic ornithischian dinosaur
Heterodontosaurus tucki Crompton & Charig, 1962 is described in detail for
the first time on the basis of two principal specimens: the holotype
(SAM-PK-K337) and referred skull (SAM-PK-K1332). In addition several other
specimens that have a bearing on the interpretation of the anatomy and
biology of Heterodontosaurus are described. The skull and lower jaw of
Heterodontosaurus are compact and robust but perhaps most notable for the
heterodont dentition that merited the generic name. Details of the cranial
anatomy are revealed and show that the skull is unexpectedly specialized in
such an early representative of the Ornithischia, including: the closely
packed, hypsodont crowns and ?warping? of the occlusal surfaces (created by
progressive variation in the angulation of wear on successive crowns) seen



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