FOSSIL MAMMALS FROM THE QUATERNARY OF TACHO DE OURO CAVE, STATE OF TOCANTINS, NORTHERN BRAZIL: DIVERSITY, TAPHONOMY AND PALEOICHNOLOGICAL AND PALEOENVIRONMENTAL ASPECTS
DOI:
https://doi.org/10.4072/20Abstract
Caves of the Bambuí Speleological Province, in Aurora do Tocantins, Northern Brazil, have revealed important fossil accumulations attributed to the Upper Pleistocene–Holocene. Recently, the first fossil records were recovered from the Tacho de Ouro cave, which are assigned to Tayassu pecari, Cervidae indet., Odocoileus virginianus, Mazama sp., Palaeolama major, Tapirus
sp., Coendou sp. and Catonyx cuvieri. The presence of extinct taxa suggests that this fossil assemblage maybe attributed to the late Pleistocene–Holocene interval. Information on the recognized habitats for the species found in the cave indicates an environment affected by climatic variations in this interval, corroborating with the hypothesis of non-contemporaneity of the species. The presence of O. virginianus in Tacho de Ouro cave represents the southmost occurrence of the species in Brazil. The taphonomical analysis indicates that the animals probably perished externally to the cave and then were carried into the cave by a low-energy hydraulic flow, being quickly buried in contact with the vadose level of the cave. Trace fossils observed in some specimens are associated with the predation or scavenging by carnivores (Fodinichnia).
Key words: Speleological Province Bambuí, Aurora do Tocantins, Pleistocene–Holocene interval.
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