A new tribe of sigmodontinae rodents (Cricetidae)

Translated title of the contribution: A new tribe of sigmodontinae rodents (Cricetidae)

Ulyses F.J. Pardiñas, Pablo Teta, Jorge Salazar-Bravo

Research output: Contribution to journalArticlepeer-review

34 Scopus citations


Phylogenetic hypotheses based on molecular markers indicate that the so-called Reithrodon group, including the extant genera Euneomys, Neotomys, and Reithrodon, formerly within the tribe Phyllotini, is not monophyletic. In turn, a new clade of tribal rank is recovered constituted by Euneomys, Irenomys, and Neotomys, comprising a small, mostly Andean sigmodontine radiation. Within the new clade, here named and diagnosed, Irenomys appears as a taxon with many specialized traits, which suggests an early divergence associated with the exploitation of Nothofagus forests. The living members of the new tribe are characterized by several mor­phological features including grooved upper incisors, narrow and parallel-sided interorbital regions, enlarged interparietals, and simplified and hypsodont molars. This new phylogenetic scenario implies a high degree of craniodental convergence among several lineages of sigmodontine rodents. The tribal position of several high-crowned extinct forms of sigmodontine rodents (e.g., Panchomys, Tafimys), formerly allocated to the Reithrodon group, is in need of revision.

Translated title of the contributionA new tribe of sigmodontinae rodents (Cricetidae)
Original languageEnglish
Pages (from-to)171-186
Number of pages16
JournalMastozoologia Neotropical
Issue number1
StatePublished - Jun 1 2015


  • Andean region
  • Euneomys
  • Irenomys
  • Neotomys
  • Reithrodon


Dive into the research topics of 'A new tribe of sigmodontinae rodents (Cricetidae)'. Together they form a unique fingerprint.

Cite this