INVESTIGADORES
GOIN Francisco Javier
artículos
Título:
Earliest South American paucituberculatans and their significancein the understanding of "pseudodiprotodont" marsupial radiations
Autor/es:
GOIN FJ; CANDELA AM; ABELLO MA; OLIVEIRA EV
Revista:
ZOOLOGICAL JOURNAL OF THE LINNEAN SOCIETY
Editorial:
The Linnean Society
Referencias:
Lugar: Londres; Año: 2009 vol. 155 p. 867 - 884
ISSN:
0024-4082
Resumen:
We describe the oldest Paucituberculata marsupials, from the La Barda and Las Flores localities (Argentina; Late Paleocene and Early-Middle Eocene), as well as from the Itaboraí Basin (Brazil; Late Paleocene). The new taxa are represented by very scarce, though well-preserved, dental remains. A parsimony analysis was performed in order to evaluate the phylogenetic affinities of these taxa. Representatives of both Riolestes capricornicus n. gen. et sp. and Bardalestes hunco n. gen. et sp. appear as basal paucituberculatans, and their molar features give clues on the early evolution of the representatives of this order. Within the Paucituberculata we recognize two major clades: Canolestoidea and Palaeothentoidea. We conclude that pseudodiprotodont marsupials of the traditional literature (i.e., Polydolopimorphia + Paucituberculata) do not form a natural group.
