First 87Sr/86Sr Isotope data for the extinct sloth Lestodon armatus: Insights into the spatial ecology of South American Late Pleistocene Megafauna

This dataset provides comprehensive data for understanding the spatial ecology of the extinct giant ground sloth, Lestodon armatus, during the Late Pleistocene in Uruguay, South America. The research context focuses on elucidating mobility patterns and landscape use of this species through strontium isotope analysis. The dataset includes raw 87Sr/86Sr isotope values obtained from L. armatus bone and dentin samples collected from six distinct localities in Uruguay, including data from six individuals and serial sampling of one tooth from one of the sampled sites. Users can utilize these data to replicate the findings of Varela & Fariña (2025), which showed highly localized 87Sr/86Sr signatures, suggesting limited movement and defined home ranges for this species, and ruled out extensive seasonal migrations.
Included are all 87Sr/86Sr isotope data and the R script (script.R) used for statistical analysis, generation of figures, probability-of-origin surfaces, and home range estimation..., , # First 87Sr/86Sr Isotope data for the extinct sloth Lestodon armatus: Insights into the spatial ecology of South American Late Pleistocene megafauna

Dataset DOI: [10.5061/dryad.4qrfj6qpc](10.5061/dryad.4qrfj6qpc)

## Description of the data and file structure

Varela & Fariña (2025)

Data and code to reproduce the analysis presented in Varela & Fariña (2025). First 87Sr/86Sr Isotope Data for the Extinct Sloth Lestodon armatus: Insights into the Spatial Ecology of South American Late Pleistocene Megafauna. Proceedings B. Doi: 10.1098/rspb.2025-0309

**87Sr/86Sr Analysis**:
DataFossil includes the 87Sr/86Sr Isotope Data generated in the present study.

UYData includes data for Uruguay from Avigliano et al. (2020)

UYisoSr includes the Sr isoscape from Bataille et al. (2020) cropped to the region of interest of the study

Rasters for intermediate results are also provided as .tif files.

**Connectivity Analysis**:
Suitability and Resistivity rasters for L. armatus are provided as .tif fi...,