How Marine Isotope Stage 3 (MIS3) is reflected in northern Mesopotamia faunal assemblage of Argentina: The Xenarthra Cingulata case.

FRANCIA A.; ZURITA AE.; CARLINI A.

QUATERNARY INTERNATIONAL

PERGAMON-ELSEVIER SCIENCE LTD

Lugar: Amsterdam; Año: 2015 vol. 2015 p. 1 - 14

1040-6182

MIS 3 (60e25 ka) corresponds to a long interstadial episode considered generally warmer than MIS 2 and4, and including numerous and abrupt DansgaardeOeschger and Heinrich events, sometimes brief butvery intense. The materials studied here, coming from the Late Pleistocene exposures in central-northMesopotamia (Corrientes province, Argentina, Toropí/Yupoí Fm., MIS 3; ca. 52e36 ka), is characterizedby the presence of a large and complex vertebrate assemblage, being the Cingulata (Xenarthra) one of themost frequently represented taxa. In this work we provide an updated list of cingulates from Corrientesprovince, referrable to the Late Pleistocene, after performing new collections in the area and revisingprevious determinations. This includes: a) Dasypodidae: Propraopus sulcatus Lund, Euphractus aff.Euphractus sexcinctus Linnaeus; Chaetophractus villosus (Desmarest); b) Pampatheriidae: Holmesinapaulacoutoi (Cartelle-Guerra and Mahecha-Bohorquez), Pampatherium sp., Pampatherium typum Ameghino;c) Glyptodontidae: Panochthus tuberculatus (Owen), Panochthus sp., Glyptodon reticulatus Owen,Glyptodon sp., Neosclerocalyptus paskoensis (Zurita), Neosclerocalyptus cf. N. paskoensis (Zurita), Neosclerocalyptussp. The paleoenvironmental context that may be inferred from the palaeofaunal, particularlyfrom the diversity of cingulates in the Quaternary of Corrientes province, is characterized byalternating cold arid or semiarid pulses and warmer humid ones. Generating new evidence related toMIS 3. Even though the taxa recorded are not new, the relative occurrence of each one shows evidentdifferences with those in other areas. Using this information, the diversity of cingulates is compared tothat of Late Pleistocene faunas described for sediments from areas currently located in the provinces ofFormosa and Buenos Aires (Argentina), northern Uruguay and southern Brazil. Lastly, palaeoclimatic andpalaeobiogeographic aspects that may be inferred from the study of this assemblage are discussed in thecontext of the MIS 3.