A new ground sloth (Mammalia: Xenarthra) from the Quaternary of Brazil |
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| Authors: | Gerardo De Iuliis François Pujos Cástor Cartelle |
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| Affiliation: | 1. Faculty of Community Services and Health Sciences, George Brown College of Applied Arts and Technology, 200 King Street East, Toronto, Ontario, M5A 1J5 Canada;2. Department of Ecology and Evolutionary Biology, University of Toronto, 25, Harbord Street, Toronto, Ontario, M5S 3G5 Canada;3. Departamento de Paleontología, Instituto Argentino de Nivología Glaciología y Ciencias Ambientales (IANIGLA), CCT-CONICET-Mendoza, Avenida, Ruiz Leal s/n, Parque Gral, San Martín, 5500 Mendoza, Argentina;4. Institut français d’études Andines (IFEA), Casilla 18–1217, Avenida Arequipa 4595, Lima 18, Peru;5. Museu de Ciências Naturais. Pontifícia Universidade Católica (PUC Minas),Avenida Dom José Gaspar, 500, Coração Eucarístico, 30535–610, Belo Horizonte, Minas Gerais, Brazil |
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| Abstract: | The record of South-American Pleistocene Megalonychidae is scarce. Of the species described for intertropical Brazil, including Megalonyx sp., Ocnopus gracilis, Valgipes deformis, Xenocnus cearensis and Ahytherium aureum, only the last, recently described, is valid. The new megalonychid species described here was recovered from the same locality as Ah. aureum. The latter is apparently more closely linked to the North-American Pleistocene forms whereas Australonyx aquae may be more closely related to the Antillean sloths. The fossil remains of extant taxa recovered in association with the new sloth species suggest that the region, currently within the Caatinga biome, was a mosaic of the Atlantic Forest and Savannah biomes during the final stages of the Pleistocene. |
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