El Museo Municipal Argentino Urquiza ya tiene su primer dinosaurio terópodo
Ya se encuentra publicado en versión online el trabajo sobre este dinosaurio carnívoro, un nuevo abelisaurio, que proviene de La Invernada (Neuquén, Argentina) de rocas de la Formación Bajo de la Carpa. La excelente preservación y la significativa información que aportó el ejemplar resultaron relevantes para avanzar en el conocimiento de este grupo de terópodos, los abelisaurios. Viavenator ("cazador del camino") exxoni gen. et sp. nov. es el primero dado a conocer de una serie de ejemplares que han sido recuperados en la zona de La Invernada gracias al enorme apoyo de la empresa Exxonmobil.
Filippi, LS, Méndez, AH, Juárez Valieri, R. & Garrido, AC. 2016. A new brachyrostran with hypertrophied axial structures reveals an unexpected radiation of latest Cretaceous abelisaurids. Creataceous Research 61:209-219.
Gigantic new dinosaur from Argentina, Mendoza Province
0 comentarios Publicado por Leonardo Filippi en 12:40
Bernardo J. González Riga, Matthew C. Lamanna,
Leonardo D. Ortiz David,
Jorge O. Calvo & Juan
P. Coria
Titanosauria is an exceptionally diverse, globally-distributed clade of
sauropod dinosaurs that includes the largest known land animals. Knowledge of
titanosaurian pedal structure is critical to understanding the stance and
locomotion of these enormous herbivores and, by extension, gigantic terrestrial
vertebrates as a whole. However, completely preserved pedes are extremely rare
among Titanosauria, especially as regards the truly giant members of the group.
Here we describe Notocolossus gonzalezparejasi gen. et sp. nov.
from the Upper Cretaceous of Mendoza Province, Argentina. With a powerfully-constructed
humerus 1.76 m in length, Notocolossus is one of the largest known
dinosaurs. Furthermore, the complete pes of the new taxon exhibits a strikingly
compact, homogeneous metatarsus—seemingly adapted for bearing extraordinary
weight—and truncated unguals, morphologies that are otherwise unknown in
Sauropoda. The pes underwent a near-progressive reduction in the number of
phalanges along the line to derived titanosaurs, eventually resulting in the reduced
hind foot of these sauropods.
González
Riga, BJ., Lamanna, MC., Ortiz David, LD., Calvo, JO. & Coria, JP. 2016 A
gigantic new dinosaur from Argentina and the evolution of the sauropod hind
foot. Nature. Scientific Reports. DOI: 10.1038/srep19165
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