INVESTIGADORES
FIORELLI lucas Ernesto
artículos
Título:
Mammals from the Salicas Formation (Late Miocene), La Rioja Province, Northwest of Argentina: Paleobiogeography, age, and paleoenvironment
Autor/es:
DIEGO BRANDONI; GABRIELA SCHMIDT; ADRIANA CANDELA; JORGE NORIEGA; ERNESTO BRUNETTO; LUCAS FIORELLI
Revista:
AMEGHINIANA
Editorial:
ASOCIACION PALEONTOLOGICA ARGENTINA
Referencias:
Lugar: Buenos Aires; Año: 2012 p. 375 - 387
ISSN:
0002-7014
Resumen:
This study analyzes a collection of fossil mammals from the Salicas
Formation in the El Degolladito area, La Rioja Province, Argentina.
The materials reported herein were recovered from two sites (site 1 and site
2). Reported mammals are Macrochorobates Scillato- Yané, Chasicotatus
Scillato-Yané, and Hoplophorini indet. (Xenarthra, Cingulata); Paedotherium
minor Cabrera, cf Pseudotypotherium Ameghino (Notoungulata,
Typotheria); Neobrachytherium Soria (Litopterna, Lopholipterna); Orthomyctera
Ameghino, cf. Cardiomys Ameghino, Lagostomus (Lagostomopsis)
Kraglievich, and Octodontidae indet. (Rodentia, Caviomorpha). This new
mammalian assemblage, together with one previously recorded, has several taxa
in common with mammalian associations from Central
Argentina (i.e., La Pampa Province). Among
those coming from Northwestern Argentina, the major affinity is with the El
Jarillal Member (Chiquimil Formation) and then the Andalhuala Formation (both
in Catamarca Province). The Salicas Formation fauna
is considered as latest Miocene in age until new fossil discoveries and
radioisotopic dates allow a better calibration. The fossil biota and geological
data suggest that the Salicas Formation was deposited in flatlands, under warm
and dry conditions. This environment was probably dominated by open grasslands,
with forested areas near rivers and lagoons.