IANIGLA   20881
INSTITUTO ARGENTINO DE NIVOLOGIA, GLACIOLOGIA Y CIENCIAS AMBIENTALES
Unidad Ejecutora - UE
artículos
Título:
Muyelensaurus pecheni gen. et sp. nov., a new titanosaur sauropod from the Late Cretaceous of Neuquén, Patagonia, Argentina.
Autor/es:
CALVO, JORGE; GONZÁLEZ RIGA, BERNARDO J.; PORFIRI, JUAN
Revista:
ARQUIVOS DO MUSEU NACIONAL
Editorial:
Museu Nacional - Universidade Federal do Rio de Janeiro
Referencias:
Lugar: Río de Janeiro; Año: 2007 p. 485 - 485
ISSN:
0365-4508
Resumen:
The discovery of Muyelensaurus  pecheni gen. et sp. nov., a new slender titanosaurid, is relevant from anatomical and systematic viewpoints. The specimens come from the Upper Cretaceous strata of the Portezuelo Formation (Turonian-Early Coniacian) at Loma del Lindero, Rincón de los Sauces area, Neuquén Province, Argentina. The remains include a braincase, cervical, dorsal, sacral and caudal vertebrae and numerous appendicular bones. It is characterized by the following association of autapomorphies: basal tuberas diverge 70 degrees from each other; thin and concave lamina that unit basal tuberas ventrally, basioccipital condyle wider than the proximal portion of the basal tuberas; posterior dorsal neural spines with large prespinal lamina reinforced by two small accessory laminae, distal end of pubic blade rectangular and medially thick. A cladistic phylogenetic analysis placed Muyelensaurus  pecheni and Rinconsaurus  caudamirus Calvo & González Riga in a new eutitanosaur clade named herein Rinconsauria. This new clade include middle-sized sauropods different to Aeolosaurini, Opisthocoelicaudinae or Saltasaurinae taxa. Key words: Dinosauria, Sauropoda, Titanosauria, Late Cretaceous, Patagonia, Argentina.