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Journal Articles Nature Ecology & Evolution Year : 2019

Palaeoproteomics resolves sloth relationships

Samantha Presslee
  • Function : Author
Graham J Slater
  • Function : Author
Analía M Forasiepi
  • Function : Author
Roman Fischer
Kelly Molloy
  • Function : Author
Meaghan Mackie
  • Function : Author
Jesper V Olsen
Alejandro Kramarz
  • Function : Author
Matías Taglioretti
  • Function : Author
Fernando Scaglia
  • Function : Author
Maximiliano Lezcano
  • Function : Author
José Luis Lanata
Robert Feranec
  • Function : Author
Jonathan Bloch
  • Function : Author
Adam Hajduk
  • Function : Author
Marcelo Reguero
  • Function : Author
Alex Greenwood
  • Function : Author
Brian T Chait
Kirsty Penkman
  • Function : Author
Matthew Collins
  • Function : Author

Abstract

The living tree sloths Choloepus and Bradypus are the only remaining members of Folivora, a major xenarthran radiation that occupied a wide range of habitats in many parts of the western hemisphere during the Cenozoic, including both continents and the West Indies. Ancient DNA evidence has played only a minor role in folivoran systematics, as most sloths lived in places not conducive to genomic preservation. Here we utilize collagen sequence information, both separately and in combination with published mitochondrial DNA evidence, to assess the relationships of tree sloths and their extinct relatives. Results from phylogenetic analysis of these datasets differ substantially from morphology-based concepts: Choloepus groups with Mylodontidae, not Megalonychidae; Bradypus and Megalonyx pair together as megatherioids, while monophyletic Antillean sloths may be sister to all other folivorans. Divergence estimates are consistent with fossil evidence for mid-Cenozoic presence of sloths in the West Indies and an early Miocene radiation in South America.
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Dates and versions

hal-03424226 , version 1 (10-11-2021)

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Samantha Presslee, Graham J Slater, François Pujos, Analía M Forasiepi, Roman Fischer, et al.. Palaeoproteomics resolves sloth relationships. Nature Ecology & Evolution, 2019, 3 (7), pp.1121 - 1130. ⟨10.1038/s41559-019-0909-z⟩. ⟨hal-03424226⟩
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