IIPG 25805
INSTITUTO DE INVESTIGACION EN PALEOBIOLOGIA Y GEOLOGIA
Unidad Ejecutora - UE
artículos
Título:
A new brachyrostran with hypertrophied axial structures reveals an unexpected radiation of latest Cretaceous abelisaurids
Autor/es:
FILIPPI, LEONARDO SEBASTIÁN; MÉNDEZ, ARIEL HERNÁN; JUÁREZ VALIERI, RUBÉN; GARRIDO, ALBERTO CARLOS
Revista:
CRETACEOUS RESEARCH (PRINT)
Editorial:
ACADEMIC PRESS LTD-ELSEVIER SCIENCE LTD
Referencias:
Lugar: Amsterdam; Año: 2016 vol. 61 p. 209 - 219
ISSN:
0195-6671
Resumen:
A well preserved skeleton of a new abelisaurid is reported here. The holotype of Viavenator exxoni was found in the outcrops of the Bajo de la Carpa Formation (Santonian, Upper Cretaceous), northwestern Patagonia, Argentina. This new taxon belongs to the South American clade of abelisaurids, the brachyrostrans. The current phylogenetic analysis places it as the basalmost member of a new clade of derived brachyrostrans, named Furileusauria, characterized by distinctive cranial, axial and appendicular anatomical features. The Santonian age of Viavenator allows filling the stratigraphic gap exhibited between the basal brachyrostrans of CenomanianeTuronian age, and the derived forms from the Campanian-Maastrichtian. The evolution of abelisaurids during the Late Cretaceous, faunal replacements, and the adaptive radiation that occurred during that period of time in South America are discussed.
