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8 December 2017 Cryptic diversity in the Oecomys roberti complex: revalidation of Oecomys tapajinus (Rodentia, Cricetidae)
Rita G. Rocha, Rafaela Duda, Tamara Flores, Rogério Rossi, Iracilda Sampaio, Ana C. Mendes-Oliveira, Yuri L. R. Leite, Leonora P. Costa
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Abstract

Oecomys tapajinus (Tapajós Oecomys) is currently a junior synonym of Oecomys roberti (Robert's Oecomys), a widely distributed Amazonian mouse, which probably represents a complex of cryptic species. We investigated the taxonomic status of O. tapajinus by integrating phylogenetic analyses of DNA sequences and morphological analyses of museum specimens. We were able to confirm that O. tapajinus is a valid species from eastern Amazonia and the transition to the Brazilian Cerrado, where it is sympatric with O. roberti. Oecomys tapajinus is characterized by a unique combination of morphological traits, high morphological variation, and genetic differentiation and structure related to the complex system of the Amazon River. Potential additional entities within the O. roberti complex emerged from our analyses, and further investigation with larger series may shed light on the taxonomic status of this species complex.

© 2017 American Society of Mammalogists, www.mammalogy.org
Rita G. Rocha, Rafaela Duda, Tamara Flores, Rogério Rossi, Iracilda Sampaio, Ana C. Mendes-Oliveira, Yuri L. R. Leite, and Leonora P. Costa "Cryptic diversity in the Oecomys roberti complex: revalidation of Oecomys tapajinus (Rodentia, Cricetidae)," Journal of Mammalogy 99(1), 174-186, (8 December 2017). https://doi.org/10.1093/jmammal/gyx149
Received: 10 October 2016; Accepted: 18 October 2017; Published: 8 December 2017
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