Artículo
A supposed Gondwanan oviraptorosaur from the Albian of Brazil represents the oldest South American megaraptoran
Aranciaga Rolando, Alexis Mauro
; Brissón Egli, Federico
; Sales, Marcos A. F.; Martinelli, Agustín Guillermo
; Canale, Juan Ignacio
; Ezcurra, Martin Daniel
Fecha de publicación:
04/2018
Editorial:
Academic Press Ltd - Elsevier Science Ltd
Revista:
Cretaceous Research
ISSN:
0195-6671
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
A specimen composed of a partial sacrum articulated to two anterior caudal vertebrae and an ilium (SMNS 58023) from the Lower Cretaceous (Albian) Santana Formation of Brazil was originally described as an oviraptorosaur, but it is here re-interpreted as the oldest megaraptoran of South America. The phylogenetic relationships of SMNS 58023 were tested quantitatively for the first time including it in the two most comprehensive phylogenetic data sets focused on non-maniraptoran theropods –including megaraptorans. The Brazilian specimen was consistently found as a megaraptoran in both analyses because of the presence of sacral centra longer than tall, absence of a median transverse constriction of sacral centra, and the morphology and position of sacral pleurocoels. SMNS 58023 sheds light on a region of the body that is poorly known in megaraptorans and pulls back the temporal range of the clade in South America. This re-interpretation reinforces the absence of oviraptorosaurs in Gondwana.
Palabras clave:
CRETACEOUS
,
MEGARAPTORA
,
MORPHOLOGY
,
OVIRAPTOROSAURIA
,
PHYLOGENY
,
THEROPODA
Archivos asociados
Licencia
Identificadores
Colecciones
Articulos(MACNBR)
Articulos de MUSEO ARG.DE CS.NAT "BERNARDINO RIVADAVIA"
Articulos de MUSEO ARG.DE CS.NAT "BERNARDINO RIVADAVIA"
Citación
Aranciaga Rolando, Alexis Mauro; Brissón Egli, Federico; Sales, Marcos A. F.; Martinelli, Agustín Guillermo; Canale, Juan Ignacio; et al.; A supposed Gondwanan oviraptorosaur from the Albian of Brazil represents the oldest South American megaraptoran; Academic Press Ltd - Elsevier Science Ltd; Cretaceous Research; 84; 4-2018; 107-119
Compartir
Altmétricas