BECAS
ARANCIAGA ROLANDO Alexis Mauro
artículos
Título:
A new ornithopod (Dinosauria, Ornithischia) from the Upper Cretaceous of Antarctica and its palaeobiogeographical implications
Autor/es:
SEBASTIAN ROZADILLA ; FEDERICO L. AGNOLIN; FERNANDO E. NOVAS; ALEXIS M. ARANCIAGA ROLANDO; MATÍAS J. MOTTA; JUAN M. LIRIO; MARCELO P. ISASI
Revista:
CRETACEOUS RESEARCH (PRINT)
Editorial:
ACADEMIC PRESS LTD-ELSEVIER SCIENCE LTD
Referencias:
Lugar: Amsterdam; Año: 2015 vol. 57 p. 311 - 324
ISSN:
0195-6671
Resumen:
A new ornithopod dinosaur from the Upper Cretaceous (Maastrichtian) Snow Hill Island Formation, atJames Ross Island, Antarctica is here described. This new taxon, named as Morrosaurus antarcticus gen. etsp. nov., is represented by a fragmentary right hind limb belonging to a medium-sized individual. Ourphylogenetic analysis nests the new taxon in a monophyletic clade of Southern Hemisphere ornithopodsthat includes most Patagonian and Antarctic ornithopods. Several members of this group share a slenderand bunched foot with narrow metatarsal IV, expanded chevrons, and bowed humerus without deltopectoralcrest. Several features indicate that these ornithopods exhibit adaptations for a specializedcursorial mode of life. The recognition of Patagonian and Antarctic Ornithopoda belonging to a monophyleticclade reinforces palaeobiogeographical signals indicating that Patagonia, Antarctica andAustralia shared a common Late Cretaceous terrestrial fauna
