Structural Extremes in a Cretaceous Dinosaur

@article{Sereno2007StructuralEI,
  title={Structural Extremes in a Cretaceous Dinosaur},
  author={Paul C. Sereno and Jeffrey A. Wilson and Lawrence M. Witmer and John A. Whitlock and A. Maga and Oumarou Amadou Id{\'e} and Timothy Rowe},
  journal={PLoS ONE},
  year={2007},
  volume={2}
}
Fossils of the Early Cretaceous dinosaur, Nigersaurus taqueti, document for the first time the cranial anatomy of a rebbachisaurid sauropod. Its extreme adaptations for herbivory at ground-level challenge current hypotheses regarding feeding function and feeding strategy among diplodocoids, the larger clade of sauropods that includes Nigersaurus. We used high resolution computed tomography, stereolithography, and standard molding and casting techniques to reassemble the extremely fragile skull… Expand
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References

SHOWING 1-10 OF 76 REFERENCES
Digital Reconstructions of Sauropod Dinosaurs and Implications for Feeding
n recent years, sauropods HAVE been interpreted primarily as quadrupedal herbivores, with sympatric taxa differentiated in their feeding behavior presumably according to their dentition and feedingExpand
The evolution of sauropod feeding mechanisms
TLDR
Sauropods were gigantic, long-necked, herbivorous dinosaurs, which dominated many Jurassic and Cretaceous terrestrial faunas, and the ‘aquatic’ hypothesis had an important effect on interpretations of sauropod feeding habits and mechanisms. Expand
First rebbachisaurid dinosaur (Sauropoda, Diplodocoidea) from the early Cretaceous of Spain: : palaeobiogeographical implications
Sauropod remains from the early Cretaceous (late Barremian-early Aptian) of Salas de los Infantes (Burgos, Spain) are described. The material consists of several caudal vertebrae, chevrons, a pair ofExpand
Sauropod dinosaur phylogeny: critique and cladistic analysis
TLDR
A lower-level phylogenetic analysis of Sauropoda is presented, which resolves six sauropod outgroups to Neosauropoda, which comprises the large-nostrilled clade Macronaria and the peg-toothedclade Diplodocoidea. Expand
Thunder-lizards : the Sauropodomorph dinosaurs
TLDR
The present work focuses on postcranial Anatomy of Referred Specimens of the Sauropodomorph Dinosaur Melanorosaurus from the Upper Triassic of South Africa, which has implications for Functional Morphology, Evolution, and Phylogeny. Expand
Discovery of a short-necked sauropod dinosaur from the Late Jurassic period of Patagonia
TLDR
This taxon indicates that there was a rapid radiation and dispersal of dicraeosaurids in the Late Jurassic of the Southern Hemisphere, after the separation of Gondwana from the northern continents by the late Middle Jurassic. Expand
Postcranial Skeletal Pneumaticity in Sauropods and Its Implications for Mass Estimates
of sauropods, and one of the cornerstones of our fascination with them, is their apparent efficiency of design. The presacral neural spines of all sauropods have a complex of bony ridges or platesExpand
Remains of Sauropoda (Reptilia, Saurischia) in the Lower Cretaceous (Upper Hauterivian/Lower Barremian) Limestones of SW Istria (Croatia)
Remains belonging 10 sauropod dinosaurs have recently been discovered in Upper Hauterivian/Lower Barremian (Lower Cretaceous) limestones of SW Istria (Croatia). The material consists of a completeExpand
Structure and evolution of a sauropod tooth battery
dinosaurs rose to predominance among vertebrate herbivores, in terms of both species diversity and biomass (e.g., Romer 1966; McIntosh 1990). Their perceived decline on northern landmasses during theExpand
LOWER CRETACEOUS REBBACHISAURID SAUROPODS FROM CERRO AGUADA DEL LEÓN (LOHAN CURA FORMATION), NEUQUÉN PROVINCE, NORTHWESTERN PATAGONIA, ARGENTINA
Abstract We describe sauropod material from the Lower Cretaceous (Aptian-Albian) Puesto Quiroga Member of the Lohan Cura Formation, exposed at the Cerro Aguada del León locality (La Picaza area,Expand
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