SciELO - Scientific Electronic Library Online

vol.28 issue3Two new species of Kalcerrytus Galiano, 2000 (Araneae: Salticidae) from Tambopata River, Madre de Dios, Peru author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Services on Demand




  • Have no cited articlesCited by SciELO

Related links


Revista Peruana de Biología

On-line version ISSN 1727-9933


RUELAS, Dennisse  and  PACHECO, Víctor. A new species of Thomasomys Coues, 1884 (Rodentia: Sigmodontinae) from the montane forests of northern Peru with comments on the "aureus" group. Rev. peru biol. [online]. 2021, vol.28, n.3, e19912. ISSN 1727-9933.

We describe a new species of the cricetid rodent Thomasomys (Sigmodontinae) of the "aureus" group based on four specimens collected from Carmen de la Frontera, Piura Department, Peru. This new species has a very long and white tail, very long mystacial vibrissae that extend posteriorly beyond the pinnae, and a distinctive cranial and dental morphology that differ from any other known species of Thomasomys. It is also one of the largest species of Thomasomys, exceeded in size only by T. apeco. A phylogenetic analysis using sequences of Cytb recovered this species within a non-monophyletic "aureus" group with a genetic distance between 5.47% (with T. auricularis) to 10.17% (with Thomasomys sp. 1). In addition to this finding, the phylogenetic position of T. apeco, T. praetor, and T. pyrrhonotus are presented for the first time, prompting a discussion on the nature of the "aureus" group.

Keywords : Piura; Thomasomys apeco; Thomasomys praetor; Thomasomys pyrrhonotus; Yungas.

        · abstract in Spanish     · text in English     · English ( pdf )