Filippi, L. S., Martinelli, A. G. y Garrido, A. C.
The clade
Aeolosaurini is represented by several specimens found, so far, only in
Argentina and Brazil. The material reported here corresponds to a sauropod
titanosaur consisting of four incomplete anterior caudal vertebrae, from the
Narambuena Paleontological Site, Rincón de los Sauces, Neuquén Province,
Argentina. The specimen comes from the Plottier Formation (late Coniacian-lower
Santonian, Upper Cretaceous), Neuquén Group. The specimen has a combination of
features that includes it into the clade Aeolosaurini: anterior caudal centra
with anterodorsal margin bent forward; prezygapophyses elongated in anterior
caudal, in correlation with the extreme displacement of the neural arch
forward; and anteroposteriorly elongated articular facets of prezygapophyses,
at least in the anterior caudals. However, it differs from other Aeolosaurini
by having postzygapophysis with anteroposteriorly short articular facets, not
as elongated in the prezygapophyses. This specimen corresponds not only to the
fi rst discovery of an Aeolosaurini in the north of the Neuquén Basin (because Rinconsaurus
caudamirus Calvo & Gonzalez Riga has been included in another clade,
Rinconsauria), but also the oldest record of the group.
Filippi, L. S., Martinelli, A. G. y Garrido, A.
C. 2013. Registro de un dinosaurio
Aeolosaurini (Sauropoda, Titanosauria) en el Cretácico Superior (Formación
Plottier) del Norte de la Provincia de Neuquén, Argentina, y comentarios sobre los Aeolosaurini
sudamericanos. Revista Brasilera de Paleontología 16 (1): 147-156.
Subscribe to:
Enviar comentarios (Atom)
0 comentarios:
Publicar un comentario