INVESTIGADORES
ZURITA Alfredo Eduardo
congresos y reuniones científicas
Título:
The southernmost record of a Neuryurini Hoffstetter (Mammalia, Xenarthra, Glyptodontidae)
Autor/es:
GONZALEZ-RUIZ, L.; ZURITA, A. E; FLEAGLE, J.; SCILLATO-YANÉ, G. J.; DOZO, M.T.; ZAMORANO, M.
Lugar:
Buenos Aires
Reunión:
Jornada; Reunión Anual de Comunicaciones de la APA; 2009
Institución organizadora:
APA, CONICET
Resumen:
Here we document the southernmost and probably the oldest record of the tribe
Neuryurini (Glyptodontidae). The oldest record of this tribe corresponds to the genus
Pseudoeuryurus Ameghino (Mesopotamiense, late Miocene-Pliocene) and
Urotherium Castellanos (Araucanense, late Miocene-Pliocene), but both taxa are
placed tentatively within the Neuryurini. The southernmost record of this tribe out of
Patagonia is Neuryurus sp. from Lujanian sediments (Luján Formation, late Pleistocene
early Holocene) at Quequén Grande river (Buenos Aires Province). The first and only
record of a specimen of the Neuryurini in Patagonia was reported from the upper levels
of the Puerto Madryn Formation (Huayquerian Age, late Miocene), exposed in
Península Valdez (Chubut Province, Argentina); it is an isolated osteoderm assigned to
Neuryurini indet. (MPEF-PV 2533). The new record consists of two associated, well
preserved osteoderms (MPM-PV 1868) also assigned to an indeterminate Neuryurini,
recovered as a surface find at Estancia La Peninsular, Santa Cruz Province, Argentina.
This locality has been recognized in geological studies as part of the Santa Cruz
Formation (Santacrucian Age, late-early Miocene) and there were no reported fossil
records until now. Further studies will be need to determine of there are younger
desposits present. It is noted that the tribe Neuryurini is absent in all other Santacrucian
and Friasian (middle Miocene) deposits. Therefore, the new specimen represents the
southernmost member of that tribe discovered up to now, and with the two confirmed
records of Glyptodon Owen and Panochthus Burmeister (both from the Quaternary) arethe only non-Propalaehoplophorinae glyptodontids reported for Santa Cruz Province