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Mammalian Biology

, Volume 68, Issue 6, pp 351–364 | Cite as

Phylogenetic analysis of sigmodontine rodents (Muroidea), with special reference to the akodont genus Deltamys

  • G. D’ElîaEmail author
  • E. M. González
  • U. F. J. Pardiñas
Original investigation

Abstract

We present a comprehensive phylogenetic analysis based on cytochrome b gene sequences of sigmodontine rodents. Our particular interest is to estimate the phyletic position of Deltamys, a tax-on endemic to a small portion of the La Plata river basin in Argentina, Brazil, and Uruguay, and to assess its generic status. The three primary conclusions derived from our analyses are: (1) cotton rats (Sigmodon) are the sister group of the remaining sigmodontines, (2) the tribe Akodontini is monophyletic with moderate support, and (3) Deltamys falls outside of a clade containing all species of subgenera of Akodon yet examined, and thus we grant Deltamys status of full genus.

Keywords

Akodon Akodontini Muroidea Sigmodontinae phylogeny 

Phylogenetische Analyse sigmodontiner Nager (Muroidea), mit besonderer Berücksichtigung der akodonten Gattung Deltamys

Zusammenfassung

Die Autoren stellen eine umfassende phylogenetische Analyse der sigmodontinen Nagetiere mit Hilfe von Cytochrom b Gen-Sequenzen vor. Von besonderem Interesse ist dabei die phyletische Stellung und der fragliche generische Status von Deltamys, einem Taxon, das endemisch in einem kleinen Gebiet des La Plata Flußdeltas in Argentinien, Brasilien und Uruguay vorkommt. Die Studie lieferte drei wesentliche Ergebnisse: (1) Baumwollratten (Sigmodon) bilden die basale Gruppe der Unterfamilie Sigmodontinae, (2) das Tribus Akondontini ist monophyletisch, und (3) Deltamys fällt außerhalb einer Gruppe, die alle untersuchten Arten von Akodon umfaßt, und sollte daher Gattungsrang erhalten.

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Copyright information

© Deutsche Gesellschaft für Säugetierkunde 2003

Authors and Affiliations

  • G. D’Elîa
    • 1
    • 2
    Email author
  • E. M. González
    • 1
    • 3
  • U. F. J. Pardiñas
    • 1
    • 4
  1. 1.The University of Michigan Museum of ZoologyAnn ArborUSA
  2. 2.Laboratorio de EvoluciónFacultad de CienciasMontevideoUruguay
  3. 3.Museo Nacional de Historia NaturalMontevideoUruguay
  4. 4.Centro Nacional PatagónicoPuerto Madryn, ChubutArgentina

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