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Additional Information

Competing Interests

The authors declare they have no competing interests.

Author Contributions

Marcelo de la Fuente analyzed the data, wrote the paper.

Ignacio Maniel phylogenetic analysis.

Juan Marcos Jannello paleohistology analysis.

Juliana Sterli reviewed drafts of the paper.

Bernardo González Riga reviewed drafts of the paper.

Fernando Novas reviewed drafts of the paper.


This research was partially supported by PICT 2013-0095 grants to MSdlF. The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.

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