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Mammalia

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Volume 82, Issue 3

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Syntopy of cryptic Phyllomys (Rodentia: Echimyidae) species: description of the karyotype of Phyllomys nigrispinus and an expansion of the geographic distribution of Phyllomys sulinus

Ana Cláudia Delciellos
  • Corresponding author
  • Laboratório de Vertebrados, Departamento de Ecologia, Instituto de Biologia, Universidade Federal do Rio de Janeiro, CP 68020, Ilha do Fundão, CEP 21941-901, Rio de Janeiro, RJ, Brazil
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  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
/ Ana Carolina Loss
  • Laboratório de Mastozoologia e Biogeografia, Departamento de Ciências Biológicas, Universidade Federal do Espírito Santo, Av. Fernando Ferrari 514, Goiabeiras, CEP 29075-910, Vitória, ES, Brazil
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  • De Gruyter OnlineGoogle Scholar
/ Marcia Aguieiras
  • Laboratório de Mastozoologia, Departamento de Zoologia, Instituto de Biologia, Universidade do Estado do Rio de Janeiro, Rua São Francisco Xavier 524, Maracanã, CEP 20550-900, Rio de Janeiro, RJ, Brazil
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  • De Gruyter OnlineGoogle Scholar
/ Lena Geise
  • Laboratório de Mastozoologia, Departamento de Zoologia, Instituto de Biologia, Universidade do Estado do Rio de Janeiro, Rua São Francisco Xavier 524, Maracanã, CEP 20550-900, Rio de Janeiro, RJ, Brazil
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  • De Gruyter OnlineGoogle Scholar
/ Oscar Rocha-Barbosa
  • Laboratório de Zoologia de Vertebrados – Tetrapoda, Instituto de Biologia, Universidade do Estado do Rio de Janeiro, Rua São Francisco Xavier 524, Maracanã, CEP 20550-900, Rio de Janeiro, RJ, Brazil
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Published Online: 2017-08-28 | DOI: https://doi.org/10.1515/mammalia-2016-0149

Abstract

The echimyid rodents of the genus Phyllomys are medium-sized arboreal spiny rats endemic to the Atlantic Forest of Brazil. The genus is currently composed of 13 species, although there are at least four other undescribed species. The ecology, zoogeography and diversity of the genus are still poorly understood. Here, we provide the first record of Phyllomys sulinus from the Brazilian state of Rio de Janeiro, based on a specimen collected in the Serra da Bocaina National Park, which extends the known geographic range of the species approximately 130 km to the northeast. At this site, P. sulinus occurred in syntopy with the cryptic Phyllomys nigrispinus. We describe the karyotype of P. nigrispinus for the first time and identify two different diploid numbers (2n=84 and 85). We also conducted a molecular analysis of the cytochrome b gene of five specimens, which we identified by phylogenetic reconstruction. Our findings reinforce the importance of molecular data, such as DNA sequences, and karyotypes for the differentiation of cryptic, syntopic species.

Keywords: Atlantic Forest; Atlantic tree rats; cytb; molecular analysis; Serra da Bocaina National Park

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About the article

Received: 2016-10-07

Accepted: 2017-07-05

Published Online: 2017-08-28

Published in Print: 2018-04-25


Citation Information: Mammalia, Volume 82, Issue 3, Pages 266–275, ISSN (Online) 1864-1547, ISSN (Print) 0025-1461, DOI: https://doi.org/10.1515/mammalia-2016-0149.

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