The largest freshwater odontocete: a South Asian river dolphin relative from the Proto-Amazonia

Several dolphin lineages have independently invaded freshwater systems. Among these, the evolution of the South Asian river dolphin Platanista and its closest relatives (Platanistidae) remains virtually unknown as fossils are scarce. Here, we describe Pebanista yacuruna gen. et sp. nov., a fossil dolphin from the Miocene proto-Amazonia of Peru, recovered in phylogenies as the closest relative of Platanista. Morphological characters such as an elongated rostrum and large supraorbital crests, along with ecological interpretations, indicate that this new taxon was fully adapted to freshwater environments. Pebanista constitutes the largest freshwater odontocete known, with an estimated body length of 3 meters. It highlights the ample resource availability in the region, supporting biotic diversity during the Early to Middle Miocene. The finding of Pebanista in proto-Amazonian layers attests that platanistids ventured into freshwater ecosystems not only in South Asia, but also in South Ameri..., , , # Data from: The largest freshwater odontocete: a South Asian river dolphin relative from the Proto-Amazonia

[https://doi.org/10.5061/dryad.v41ns1s3t](https://doi.org/10.5061/dryad.v41ns1s3t)

Phylogenetic matrix used to conduct our analyses in:\
Benites-Palomino, A, Aguirre-Fernández, G., Baby, P., Ochoa, D., Altamirano, A., Flynn, J. J., Sánchez-Villagra, M., Tejada, J., de Muizon, C., & Salas-Gismondi, R. (2024). The largest freshwater odontocete:

A South Asian River dolphin relative from the Proto-Amazonia. Science Advances.

## Description of the data and file structure

Dataset modified from Bianucci et al. 2020

## Sharing/Access information

Dataset modified from: Bianucci, G., de Muizon, C., Urbina, M., & Lambert, O. (2020). Extensive diversity and disparity of the Early Miocene platanistoids (Cetacea, Odontoceti) in the southeastern Pacific (Chilcatay Formation, Peru). *Life*, *10*(3), 27