First fossil record of Tayassu pecari (Link) (Mammalia, Artiodactyla) in Argentina

FIRST FOSSIL RECORD OF TAYASSU PECARI (LINK) (MAMMALIA, ARTIODACTYLA) IN ARGENTINA. The first fossil record of Tayassu pecari (Link) in Argentina is reported, represented by isolated molars and premolars from the Yupoi Formation (late Pleistocene), Corrientes Province. From a palaeoenvironmental point of view, the presence of this taxon (mainly adapted to humid climate and woodland and forest environments) in the Yupoi Formation, together with other paleofaunistic remains (Dolichotis, Tolypeutes and Galea Meyen in the Toropi Formation, and Toxodon in the Yupoi Formation) as well as sedimentological evidences, supports the hypothesis of more humid climatic conditions than those inferred in the Toropi Formation (middle Pleistocene). The development of warmer and humid weather during the sedimentation of the Yupoi Formation may have allowed migration of "brazilian" faunas to the Mesopotamia, probably during the last interglacial (ca. 130 ka). This hypothesis is supported by the palaeofaunistic evidence obtained by other authors in other areas of the Argentine Mesopotamia, western Uruguay and southern Brazil.