MACNBR   00242
MUSEO ARGENTINO DE CIENCIAS NATURALES "BERNARDINO RIVADAVIA"
Unidad Ejecutora - UE
artículos
Título:
A carpometacarpus from the upper cretaceous of patagonia sheds light on the Ornithurine bird radiation
Autor/es:
AGNOLIN, FEDERICO; NOVAS, FERNANDO
Revista:
PALAEONTOLOGISCHE ZEITSCHRIFT
Editorial:
SPRINGER HEIDELBERG
Referencias:
Lugar: HEIDELBERG; Año: 2011 p. 1 - 1
ISSN:
0031-0220
Resumen:
We report the discovery of an isolated aviancarpometacarpus from the Upper Cretaceous Allen Formation(Campanian-Maastrichtian), Salitral Moreno, Rı┬┤oNegro Province, Argentina. This specimen is referred to cf.Neornithes because it presents a distinct but shallow infratrochlearfossa, a shortened ventral rim of the carpal trochleathat does not contact the base of the extensor process, and anextensor process conspicuously surpassing cranially thearticular facet for digit I. The isolated nature of the specimenprecludes its inclusion within the main neornithine lineages.Although it may represent part of the crown clade Neornithes,the limited data available do not confidently supportplacement within any particular lineage. The carpometacarpusconstitutes one of the few records of Mesozoic Neornithine-like birds for South America.