Extreme Cranial Ontogeny in the Upper Cretaceous Dinosaur Pachycephalosaurus
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چکیده
منابع مشابه
Extreme Cranial Ontogeny in the Upper Cretaceous Dinosaur Pachycephalosaurus
BACKGROUND Extended neoteny and late stage allometric growth increase morphological disparity between growth stages in at least some dinosaurs. Coupled with relatively low dinosaur density in the Upper Cretaceous of North America, ontogenetic transformational representatives are often difficult to distinguish. For example, many hadrosaurids previously reported to represent relatively small lamb...
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BACKGROUND A frontoparietal dome of a large pachycephalosaurid collected from the Upper Cretaceous Hell Creek Formation in 2001 is identified as Pachycephalosaurus wyomingensis. The specimen features two large oval depressions on the dorsal surface, accompanied by numerous circular pits on the margin and inner surface of the larger depressions. METHODOLOGY/PRINCIPAL FINDINGS In order to ident...
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ژورنال
عنوان ژورنال: PLoS ONE
سال: 2009
ISSN: 1932-6203
DOI: 10.1371/journal.pone.0007626