IANIGLA   20881
INSTITUTO ARGENTINO DE NIVOLOGIA, GLACIOLOGIA Y CIENCIAS AMBIENTALES
Unidad Ejecutora - UE
artículos
Título:
A mitogenomic timetree for Darwin?s enigmatic South American mammal Macrauchenia patachonica
Autor/es:
WESTBURY, MICHAEL; BALEKA, SINA; BARLOW, AXEL; HARTMANN, STEFANIE; PAIJMANS, JOHANNA L.A.; KRAMARZ, ALEJANDRO; FORASIEPI, ANALÍA M; BOND, MARIANO; GELFO, JAVIER N.; REGUERO, MARCELO A.; LÓPEZ-MENDOZA, PATRICIO; TAGLIORETTI, MATIAS; SCAGLIA, FERNANDO; RINDERKNECHT, ANDRÉS; JONES, WASHINGTON; MENA, FRANCISCO; BILLET, GUILLAUME; DE MUIZON, CHRISTIAN; AGUILAR, JOSÉ LUIS; MACPHEE, ROSS D.E.; HOFREITER, MICHAEL
Revista:
NATURE COMMUNICATIONS
Editorial:
Nature
Referencias:
Año: 2017 vol. 8 p. 1 - 1
ISSN:
2041-1723
Resumen:
The unusual mix of morphological traits displayed by extinct South American nativeungulates (SANUs) confounded both Charles Darwin, who first discovered them, andRichard Owen, who tried to resolve their relationships. Here we report an almost completemitochondrial genome for the litoptern Macrauchenia. Our dated phylogenetic tree placesMacrauchenia as sister to Perissodactyla, but close to the radiation of major lineageswithin Laurasiatheria. This position is consistent with a divergence estimate of 66Ma(95% credibility interval, 56.64?77.83 Ma) obtained for the split between Macrauchenia andother Panperissodactyla. Combined with their morphological distinctiveness, this evidencesupports 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 stillbe amenable to palaeogenomic analysis through iterative mapping against more distantrelatives.
rds']