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. 2020 Jan 31;10:1608. doi: 10.1038/s41598-020-58575-6

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© The Author(s) 2020

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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Geographical setting of the studied paleontological localities. (A) General map of South America. (B) Detailed map showing the situation of the Late Cenozoic fossil sites from Argentina (La Pampa and Buenos Aires provinces) selected in this study. CB: Cerro La Bota, AC: Arroyo Chasicó, Te: Telén, Qu: Quehué, SG: Salinas Grandes de Hidalgo, BG: Bajo Giuliani, Ca: Caleufú, FM: Farola Monte Hermoso, TR: Toscas del Río de La Plata, Lu: Luján, BA: Buenos Aires city area, RS: Río Salado, AT: Arroyo Tapalqué, PO: Paso Otero, CP: Cascada del Paleolama, PB: Playa del Barco, SR: Santa Rosa, ZS: Zanjón Seco. Samples from Arroyo Chasicó locality include fossils from Late Miocene (Chasicoan = C) and the Late Pleistocene (Lujanian = L) levels. Satellite images were freely downloaded from the Instituto Geográfico Nacional de Argentina. QGIS Desktop 3.2.3 with GRASAS 7.4.1 free software was used to assemble images (https://www.qgis.org/es/site/).