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1 June 2017 The extinction of Xenothrix mcgregori, Jamaica's last monkey
Siobhán B. Cooke, Alexis M. Mychajliw, John Southon, Ross D. E. MacPhee
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Abstract

The Jamaican primate, Xenothrix mcgregori, regarded variously as either a pitheciid or a stem platyrrhine, was the terminal branch of a clade that likely entered the West Indies at least as early as the Early Miocene, although its lineage is represented by fossils of Quaternary age only. We present a new direct radiocarbon-based date of 1,477 ± 34 calibrated years before present (cal BP) for the last documented appearance of this species in the fossil record. We employed the Gaussian-resampled, inverse-weighted McInerny et al. (GRIWM) method to estimate the extinction date of X. mcgregori, based on the data presented here as well as 6 other dates derived from X. mcgregori sites. On this basis, we estimated a last occurrence ∼900 BP. The cause or causes of this extinction, as well as the many others that occurred in late Quaternary of the Greater Antilles, remain a matter of debate. The likeliest inference is that these losses were largely if not completely anthropogenically driven. Although many species and populations of primates are critically threatened today, the loss of X. mcgregori stands as the most recent species-level extinction within Anthropoidea corroborated by radiometric evidence.

© 2017 American Society of Mammalogists, www.mammalogy.org
Siobhán B. Cooke, Alexis M. Mychajliw, John Southon, and Ross D. E. MacPhee "The extinction of Xenothrix mcgregori, Jamaica's last monkey," Journal of Mammalogy 98(4), 937-949, (1 June 2017). https://doi.org/10.1093/jmammal/gyw165
Published: 1 June 2017
JOURNAL ARTICLE
13 PAGES


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KEYWORDS
Caribbean
extinction
Greater Antilles
GRIWM method
Jamaica
platyrrhine evolution
radiocarbon dating
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