Molecular systematics of the South American rodent Calomys laucha (Cricetidae: Sigmodontinae), a reservoir of the Laguna Negra hantavirus

Raúl E. González-Ittig, Narayan Kandel, Silvana Levis, Gladys Calderón, Jorge Salazar-Bravo, Cristina N. Gardenal

Research output: Contribution to journalArticle

8 Scopus citations

Abstract

The small vesper mouse (Calomys laucha (Fischer, 1814)) (Cricetidae: Sigmodontinae) ranges widely in Brazil, Uruguay, Paraguay, Argentina, and Bolivia. The species is the reservoir of the Laguna Negra hantavirus (LNV) in Paraguay but not in Argentina, where it is one of the most abundant rodents in agro-pastoral ecosystems. To answer the question if the nominal species C. laucha constitutes a single genetic unit or if it presents genetic discontinuities that may relate to hosting LNV, we sequenced the cytochrome b (cyt b) gene of specimens from throughout the range of the distribution of the species. Phylogenetic analyses revealed two well-supported clades. Twenty-two sequences from Argentina, Paraguay, and Bolivia grouped in clade A, but three sequences from Uruguay and Brazil clusteredin a quite divergent clade B. The genetic distance between the two groups is 5.75%. No significant differences between Argentinean, Paraguayan, and Bolivian specimens assigned to C. laucha were detected. The restricted distribution of LNV associated to C. laucha in central Paraguay could be explained by a “natural nidality” phenomenon.

Original languageEnglish
Pages (from-to)1093-1098
Number of pages6
JournalCanadian Journal of Zoology
Volume92
Issue number12
DOIs
StatePublished - Oct 20 2014

Keywords

  • Calomys laucha
  • Cryptic species
  • Cytochrome B
  • Laguna Negra hantavirus
  • South American rodents

Fingerprint Dive into the research topics of 'Molecular systematics of the South American rodent Calomys laucha (Cricetidae: Sigmodontinae), a reservoir of the Laguna Negra hantavirus'. Together they form a unique fingerprint.

Cite this