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Taxonomical notes on the long-clawed mole mice of the genus Geoxus (Cricetidae), with the description of a new species from an oceanic island of southern Chile


Abstract


The rodent genus Geoxus was largely considered as monotypic; however, a growing body of evidence suggests that this figure is incorrect. In this work, based on qualitative and quantitative morphological evidence and DNA sequence data, we reviewed the alpha taxonomy of this genus. Based on the examination of 134 specimens, four species are recognized within Geoxus: G. annectens (until recently referred to the genus Pearsonomys), G. michaelseni, G. valdivianus, and one species described herein as new. The four species have unique combinations of qualitative and quantitative morphological characters and were recovered as monophyletic using mitochondrial DNA sequences. The new species diagnosed and named here is endemic of Guafo Island, a small island of 299 square kilometers on southern Pacific Chile. Phylogenetic analysis placed the new species as sister of G. michaelseni, a form widely distributed in southern Argentinean and Chilean Patagonia. 


Keywords


Abrotrichini; Chile; Guafo Island; Muroidea; Sigmodontinae

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DOI: http://dx.doi.org/10.4404/hystrix-27.2-11996

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Copyright (c) 2016 Pablo Teta

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Hystrix, the Italian Journal of Mammalogy ISSN 1825-5272 (electronic version) 0394-1914 (printed version) Impact Factor (2015) 4.333, SNIP (2014) 1.01.
Published by Associazione Teriologica Italiana
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Creative Commons LicenseWorks published in Hystrix are licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.