INVESTIGADORES
ZURITA Alfredo Eduardo
artículos
Título:
Regarding the real diversity of Glyptodontidae (Mammalia, Xenarthra) in the late Pliocene (Chapadmalalan Age/Stage) of Argentina
Autor/es:
ZURITA, A. E; TAGLIORETTI, M.; DE LOS REYES, M.; CUADRELLI, F.; POIRÉ, D
Revista:
ANAIS DA ACADEMIA BRASILEIRA DE CIENCIAS.
Editorial:
ACAD BRASILEIRA DE CIENCIAS
Referencias:
Lugar: Rio de Janeiro; Año: 2016 p. 809 - 827
ISSN:
0001-3765
Resumen:
A large diversity of Glyptodontidae has been proposed as characterizing the Chapadmalalan Age (Pliocene). Most of these taxa were recognized on the basis of partial dorsal carapaces and/or caudal tubes, whereas the main diagnostic character is a particular morphology of the exposed surface of the osteoderms. From a biostratigraphic view point some species have importance. The Upper Chapadmalalan is based on the Paraglyptodon chapadmalensis biozone. Both the re-evaluation of the type and referred materials and new significant findings from the Chapadmalal and El Polvorín Formations indicate that the diversity of Pliocene Glyptodontidae is more limited than previously supposed. The particular morphology of the exposed surface of the osteoderms that characterizes some of the species actually corresponds to a taphonomic alteration, which results in a non-real ornamentation pattern. Thus, the Glyptodontinae P. chapadmalensis must be replaced as a fossil guide because this species is not well characterized, as well as the species included in the genera Urotherium, Trachycalyptus and Lomaphorus. Taking into account the diversity of Glyptodontidae for this lapse, the Glyptodontinae are very scarce (a situation that contrasts with its records in the Pleistocene), whereas Eosclerocalyptus, ?Plohophorini? (Plohophorus) and Doedicurinae (cf. Eleutherocercus antiquus) are among the most recorded taxa