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Evolutionary History of the Nesophontidae, the Last Unplaced Recent Mammal Family
Swedish Museum of Natural History, Department of Bioinformatics and Genetics.
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2016 (English)In: Molecular biology and evolution, ISSN 0737-4038, E-ISSN 1537-1719, Vol. 33, no 12, 3095-3103 p.Article in journal (Refereed) Published
Abstract [en]

The mammalian evolutionary tree has lost several major clades through recent human-caused extinctions. This process of historical biodiversity loss has particularly affected tropical island regions such as the Caribbean, an area of great evolutionary diversification but poor molecular preservation. The most enigmatic of the recently extinct endemic Caribbean mammals are the Nesophontidae, a family of morphologically plesiomorphic lipotyphlan insectivores with no consensus on their evolutionary affinities, and which constitute the only major recent mammal clade to lack any molecular information on their phylogenetic placement. Here, we use a palaeogenomic approach to place Nesophontidae within the phylogeny of recent Lipotyphla. We recovered the near-complete mitochondrial genome and sequences for 17 nuclear genes from a similar to 750-year-old Hispaniolan Nesophontes specimen, and identify a divergence from their closest living relatives, the Solenodontidae, more than 40 million years ago. Nesophontidae is thus an older distinct lineage than many extant mammalian orders, highlighting not only the role of island systems as "museums" of diversity that preserve ancient lineages, but also the major human-caused loss of evolutionary history.

Place, publisher, year, edition, pages
2016. Vol. 33, no 12, 3095-3103 p.
National Category
Genetics
Research subject
Diversity of life
Identifiers
URN: urn:nbn:se:nrm:diva-2074DOI: 10.1093/molbev/msw186ISI: 000387925300007OAI: oai:DiVA.org:nrm-2074DiVA: diva2:1056765
Funder
Science for Life Laboratory - a national resource center for high-throughput molecular bioscience
Available from: 2016-12-15 Created: 2016-12-15 Last updated: 2017-11-29Bibliographically approved

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