Skip to Main content Skip to Navigation
Journal articles

A mitogenomic timetree for Darwin’s enigmatic South American mammal Macrauchenia patachonica

Abstract : The unusual mix of morphological traits displayed by extinct South American native ungulates (SANUs) confounded both Charles Darwin, who first discovered them, and Richard Owen, who tried to resolve their relationships. Here we report an almost complete mitochondrial genome for the litoptern Macrauchenia. Our dated phylogenetic tree places Macrauchenia as sister to Perissodactyla, but close to the radiation of major lineages within Laurasiatheria. This position is consistent with a divergence estimate of B66 Ma (95% credibility interval, 56.64-77.83 Ma) obtained for the split between Macrauchenia and other Panperissodactyla. Combined with their morphological distinctiveness, this evidence supports the positioning of Litopterna (possibly in company with other SANU groups) as a separate order within Laurasiatheria. We also show that, when using strict criteria, extinct taxa marked by deep divergence times and a lack of close living relatives may still be amenable to palaeogenomic analysis through iterative mapping against more distant relatives.
Complete list of metadata

Cited literature [54 references]  Display  Hide  Download

https://hal.archives-ouvertes.fr/hal-02612082
Contributor : Christian de Muizon Connect in order to contact the contributor
Submitted on : Monday, May 18, 2020 - 10:08:11 PM
Last modification on : Saturday, December 4, 2021 - 4:00:02 AM

File

183-2017 Westbury et al.pdf
Publisher files allowed on an open archive

Identifiers

Citation

Michael Westbury, Sina Baleka, Axel Barlow, Stefanie Hartmann, Johanna L.A. Paijmans, et al.. A mitogenomic timetree for Darwin’s enigmatic South American mammal Macrauchenia patachonica. Nature Communications, Nature Publishing Group, 2017, 8, pp.15951. ⟨10.1038/ncomms15951⟩. ⟨hal-02612082⟩

Share

Metrics

Les métriques sont temporairement indisponibles