Biostratigraphic considerations of the Divisaderan faunal assemblage

CERDEÑO, E.; LÓPEZ, G.; REGUERO, M. A.

JOURNAL OF VERTEBRATE PALEONTOLOGY

SVP USA

Año: 2008 vol. 28 p. 574 - 577

0272-4634

Different taxonomic, stratigraphic, and sedimentological data strongly suggest that the Divisaderan faunal association is no longer valid as first defined and that it is a mixture of primitive and derived mammal taxa of different ages; the Divisaderan should therefore not be used as a land mammal age. The typical fauna from the Divisadero Largo Formation is much older than previously thought. The derived taxa, ‘T. mendocensis’ and ‘E. carettei,’ do not belong to the Divisaderan assemblage but come from the Mariño Formation; they are therefore not the oldest representatives of their respective families, Mesotheriidae and Hegetotheriidae, as previously considered. Hegetotheriidae, as previously considered.Hegetotheriidae, as previously considered. from the Mariño Formation; they are therefore not the oldest representatives of their respective families, Mesotheriidae and Hegetotheriidae, as previously considered. Hegetotheriidae, as previously considered.