INVESTIGADORES
CARLINI Alfredo Armando
artículos
Título:
The phylogenetic and biostratigrapic significance of new armadillos (Mammalia, Xenarthra, Dasypodidae, Euphractinae) from the Tinguirirican (Early Oligocene) of Chile.
Autor/es:
12- CARLINI A.A., CIANCIO M.R., FLYNN J.J., SCILLATO-YANÉ, G.J., . A. WYSS
Revista:
JOURNAL OF SYSTEMATIC PALAEONTOLOGY
Editorial:
CAMBRIDGE UNIV PRESS
Referencias:
Año: 2009 vol. 7 p. 489 - 503
ISSN:
1477-2019
Resumen:
SYNOPSIS Two new species of early Oligocene dasypodids are described from the Tinguiririca Fauna
of Chile, the basis of the recently formalised Tinguirirican South American Land Mammal Age. Specimens
recovered to date, all referable to the Euphractinae, include articulated portions of themovable
bands and pelvic shield, an unassociated partial mandible and skull, and isolated osteoderms. Ornamentation
of the osteoderms (i.e. the shape of the central figure and keel and the arrangement of
the peripheral figures) indicates that these taxa represent early diverging members of the subfamily.
Cranial remains from Chile somewhat resemble Sadypus Ameghino (?early Oligocene), particularly
in their long, low rostra. One of the new species from Tinguiririca also occurs in EoOligocene faunas
from Patagonia (Argentina) currently under study, providing a basis for long distance biochronological
correlation. The material from Tinguiririca assumes special importance given that most Eocene
and Oligocene dasypodids are known exclusively from isolated osteoderms. The unusally complete
material from Tinguiririca thus provides important phylogenetic insights by clarifying themorphology
of the cingulate exoskeleton during a key interval in the clades diversification