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Mammalian Biology

, Volume 68, Issue 3, pp 129–143 | Cite as

The genus Akodon (Muroidea: Sigmodontinae) in Misiones, Argentina

  • U. F. J. PardiñasEmail author
  • G. D’elía
  • S. Cirignoli
Original investigation

Abstract

Our understanding of the rodent diversity from the Argentinean Atlantic rainforest and its surrounding environments (Misiones Province) is still relatively poor. Here we present an update on the species inhabiting Misiones of the genus Akodon. Integrated analyses of morphology, chromosomal and molecular data allow us to document the existence of four species of Akodon in the province. One of these is apparently undescribed, and is known only from one locality in the ‘campos’ phytogeographic unit of southern Misiones. A second species, A. montensis, has a large distribution and is one of the dominant sigmodontine species in primary and secondary forest. Akodon sp. 2, previously reported as either A. serrensis and A. paranaensis, is known from only one locality at the northeast of the province, where it is sympatric with A. montensis. Also in sympatry with A. montensis at one locality in central Misiones there is a similar species with a gall bladder referred here to A. cursor. Finally, the previous reference of one specimen to A. serrensis must be discarded due to the referred specimen is lost, and the data at hand are insufficient to corroborate the identity of the specimen under question. As Misiones has the largest continuous patches of southern interior Atlantic rainforest remaining in Argentina we pose comments on the conservation significance of our study.

Key words

Rodentia Muridae Neotropics taxonomy conservation 

Die Gattung Akodon (Muroidea: Sigmodontinae) in Misiones, Argentinien

Zusammenfassung

Unser Verständnis der Diversität von Nagetieren in den argentinischen atlantischen Regenwäldern und den umliegenden Regionen (in der Provinz Misiones) ist noch verhältnismäßig begrenzt. Wir stellen neue Forschungsergebnisse über die Arten der Gattung Akodon vor, die in der Region Misiones vorkommen, und die eine der vielfältigsten sigmodontinen Nagergattung ist. Eine integrierte Analyse der morphologischen, chromosomalen und molekularen Daten ermöglicht es uns, die Existenz von vier Spezies von Akodon in der Provinz zu dokumentieren. Eine neue, unbeschriebene Art, Akodon sp. 1, ist bisher nur von einer Stelle in der pflanzengeografischen Region ‘campos’ im südlichen Misiones bekannt. A. montensis hat eine große Verbreitung und ist eine der dominierenden Sigmodontinen im Primär- und Sekundärwald. Akodon sp. 2, bisher A. serrensis und A. para-naensis benannt, ist nur an einer Stelle im Nordosten der Provinz bekannt, in der sie mit A. montensis sympatrisch ist. Ebenfalls in Sympatry mit A. montensis gibt es eine ähnliche Spezies mit einer Gallenblase, die an einer Stelle im zentralen Misiones vorkommt. Wir nennen sie A. cursor. Schließlich muß die bisherige Zuordnung eines Exemplars zu A. serrensis aufgegeben werden, da es verloren gegangen ist und die vorhandenen Daten nicht ausreichen, um die Identität des Probenmaterials zu bestimmen. Da die Provinz Misiones die größten zusammenhängenden Flächen vom südlichen, atlantischen Regenwald einnimmt, diskutieren wir die Bedeutung unserer Studie für den Naturschutz. Schließlich betonen wir den Wert der Integration von unterschiedlichem Datenmaterial zur Systematisierung von Säugetieren.

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Copyright information

© Deutsche Gesellschaft für Säugetierkunde 2003

Authors and Affiliations

  • U. F. J. Pardiñas
    • 2
    • 1
    • 4
    Email author
  • G. D’elía
    • 2
    • 1
    • 4
    • 3
  • S. Cirignoli
    • 2
    • 1
    • 4
  1. 1.Museum of Zoology University of MichiganAnn ArborUSA
  2. 2.Centro Nacional PatagónicoPuerto MadrynArgentina
  3. 3.Laboratorio de Evolución, Facultad de CienciasUniversidad Nacional de la RepúblicaMontevideoUruguay
  4. 4.Facultad de Ciencias Naturales y MuseoUniversidad Nacional de La Plata, Paseo del Bosque s/nLa PlataArgentina

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