Testing synchrony in historical biogeography: the case of new world primates and hystricognathi rodents.

Evolutionary Bioinformatics Online
Leticia Loss-OliveiraCarlos G Schrago

Abstract

The abrupt appearance of primates and hystricognath rodents in early Oligocene deposits of South America has puzzled mastozoologists for decades. Based on the geoclimatic changes that occurred during the Eocene/Oligocene transition period that may have favoured their dispersal, researchers have proposed the hypothesis that these groups arrived in synchrony. Nevertheless, the hypothesis of synchronous origins of platyrrhine and caviomorph in South America has not been explicitly evaluated. Our aim in this work was to apply a formal test for synchronous divergence times to the Platyrrhini and Caviomorpha splits. We have examined a previous work on platyrrhine and hystricognath origins, applied the test to a case where synchrony is known to occur and conducted simulations to show that it is possible to formally test the age of synchronous nodes. We show that the absolute ages of Platyrrhini/Catarrhini and Caviomorpha/Phiomorpha splits depend on data partitioning and that the test applied consistently detected synchronous events when they were known to have happened. The hypothesis that the arrival of primates and hystricognaths to the New World consisted of a unique event cannot be rejected.

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Citations

Sep 11, 2013·Journal of Evolutionary Biology·C G SchragoA E R Soares
Sep 21, 2013·Proceedings. Biological Sciences·Matt FriedmanThomas J Near
Nov 11, 2014·Annual Review of Animal Biosciences·Jill Pecon-Slattery

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Datasets Mentioned

BETA
AJ427227
AJ427258
AJ427257
AJ427236

Software Mentioned

EVOLVER
PhyML
Hlistograms
CODA
MULTIDIVTIME
PAML
R
OrthoMaM
PRANK

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