Dinosaurs of the lost continent.

• Autores: Scott D. Sampson
• Localización: Scientific American, ISSN 0036-8733, Vol. 306, Nº. 3, 2012, págs. 40-47
• Idioma: inglés
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• Resumen

  • The article discusses the discovery of fossil evidence of distinct communities of large dinosaurs from the Late Cretaceous period in an area of the western U.S. once comprising the Laramidia landmass, focusing on an excavation at the Kaiparowits Formation in Utah. Scientists have questioned how these dinosaurs could have coexisted in such a small geographical area, as the large body sizes and species diversity indicated by the fossils should have been constrained by the available resources in their home range. It is suggested that dinosaurs may have had a lower metabolic rate than previously thought, or that Late Cretaceous vegetation was more abundant, diverse, or nutritious than present-day plants in the area. INSETS: Dinosaur Diversity;Dinosaur Diversity.