An enigmatic plant-eating theropod from the Late Jurassic period of Chile
Publicado por Leonardo Filippi en 15:38
Fernando E. Novas, Leonardo Salgado, Manuel Suárez,
Federico L. Agnolín, Martín D. Ezcurra, Nicolás R. Chimento, Rita de la Cruz,
Marcelo P. Isasi, Alexander O. Vargas & David Rubilar-Rogers.
Theropod
dinosaurs were the dominant predators inmost Mesozoic era terrestrial ecosystems.
Early theropod evolution is currently interpreted as the diversification of
various carnivorous and cursorial taxa, whereas the acquisition of herbivorism,
together with the secondary loss of cursorial adaptations, occurredmuch later
among advanced coelurosaurian theropods. A new, bizarre herbivorous basal
tetanuran from the Upper Jurassic of Chile challenges this conception. The new
dinosaur was discovered at Aysén, a fossil locality in the Upper Jurassic
Toqui Formation of southern Chile (General Carrera Lake). The site yielded
abundant and exquisitely preserved three-dimensional skeletons of small archosaurs.
Several articulated individuals of Chilesaurus at different ontogenetic stages have
been collected, as well as less abundant basal crocodyliforms, and fragmentary
remains of sauropod dinosaurs (diplodocids and titanosaurians).
Fernando E.
Novas, Leonardo Salgado, Manuel Suárez, Federico L. Agnolín, Martín D. Ezcurra,
Nicolás R. Chimento, Rita de la Cruz, Marcelo P. Isasi, Alexander O. Vargas
& David Rubilar-Rogers 2015. An
enigmatic plant-eating theropod from the Late Jurassic period of Chile. Nature,
Letters. Doi10.1038/nature14307.
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