Systematic, paleobiogeographic and paleoclimate significance of the quaternary mammals from Fazenda Nova, Pernambuco, northeastern Brazil
DOI:
https://doi.org/10.4013/5066Abstract
The fossil mammals from the Fazenda Nova locality, Northeastern Brazil, represent an interval older than the Pleistocene-Holocene transition and include Xenarthra, Glyptodontidae, Glyptatelinae (with Pachyarmatherium sp.), Glyptodontinae, Glyptotheriini, Hoplophorinae indet., Pampatheriidae (with Holmesina cf. H. paulacoutoi), Megalonychidae, gen. et sp. indet., Megatheriidae (represented by Eremotherium laurillardi), Notoungulata, Toxodontinae (with Toxodon sp.), and Proboscidea (represented by Stegomastodon waringi). This paper reports and discusses the fi rst record of the North American glyptodont Glyptotheriini in Brazil, the first occurrence of Pachyarmatherium in Quaternary rocks of Pernambuco State, and the taxonomic history of the problematical taxon Chlamydotherium. OSL dating of the sediments and ESR dating of Stegomastodon teeth placed the Fazenda Nova deposits between 58.900 e 63.800 yr BP, which is equivalent to the IOS 3 and the Middle Wisconsin interstadial event recorded in the northern Andean South America. The mammal fauna from Fazenda Nova shows affinities with other southeastern and northeastern Brazilian faunas and, by the presence of Glyptotheriini and Pachyarmatherium, with those from northern South America, Central America and southern North American faunas, suggesting a warm and wet climate to the region at late Pleistocene.
Key words: mammals, late Pleistocene, taxonomy, paleoclimate, ESR and OSL ages, Brazil.Downloads
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