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Taxonomic review of genus Sooretamys Weksler, Percequillo & Voss (Rodentia: Cricetidae: Sigmodontinae): an integrative approach

de Almeida Chiquito, Elisandra ; D'Elía, Guillermo ; Percequillo, Alexandre Reis

Zoological journal of the Linnean Society, 2014-08, Vol.171 (4), p.842-877 [Periódico revisado por pares]

Blackwell Publishing Ltd

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  • Título:
    Taxonomic review of genus Sooretamys Weksler, Percequillo & Voss (Rodentia: Cricetidae: Sigmodontinae): an integrative approach
  • Autor: de Almeida Chiquito, Elisandra ; D'Elía, Guillermo ; Percequillo, Alexandre Reis
  • Assuntos: biogeography ; cytochrome b ; geographical variation ; morphology ; morphometry ; Neotropical region ; Oryzomyini ; phylogeography ; South America ; taxonomy
  • É parte de: Zoological journal of the Linnean Society, 2014-08, Vol.171 (4), p.842-877
  • Notas: Table S1. Genetic distances of the cytochrome b gene within (p-distance: second column, "intra") and among (p-distance: below the diagonal; Kimura 2 parameters: above the diagonal) localities of Sooretamys angouya (the first column shows the country and the State/Province/Department abbreviation, see Figure 3 and Appendix II for locality details).
    istex:C0A0094843191974C41B5D1686D52200B879B9F9
    The Field Museum
    MECESUP - No. AUS1203
    Museum of Comparative Zoology
    Conselho Nacional de Pesquisa e Desenvolvimento - No. 476249/2008-2
    ArticleID:ZOJ12146
    ark:/67375/WNG-5V1C9Q1H-4
    Fundação de Amparo à Pesquisa do Estado de São Paulo - No. 2007/05859-9; No. 98/05075-7; No. 2009/16009-1
    American Museum of Natural History
    FONDECYT - No. 1110737
    Smithsonian Institution
    University of Michigan Museum of Zoology
  • Descrição: Sooretamys is a monotypic genus of the family Cricetidae, subfamily Sigmodontinae, that is distributed throughout eastern South America in the Atlantic Forest Biome, including Argentina, Brazil, and Paraguay. The taxonomic history of the forms associated with this genus is long and relatively complex, and few studies have evaluated the taxonomic problems of this genus. To this end, our goal was to describe the degree and geographical pattern of morphological and molecular variation in this genus to test the current hypothesis that the genus is monotypic, and, as a consequence, to determine the status of the nominal forms associated with Sooretamys. Accordingly, we employed morphometric, morphological, and molecular tools, according to an integrative taxonomy approach. The results show that some level of morphometric discontinuity is present between the individuals from Paraguay and those from adjacent localities in Brazil and Argentina; sharp discontinuities were not observed in qualitative traits. Molecular analyses of the mitochondrial cytochrome b gene showed that the Paraguayan populations have some degree of genetic differentiation, but the haplotypic variants do not form a monophyletic group. Thus, the evidence so far suggests a difference in the genes and morphology of the Paraguayan population, but there is no consistent resolution (e.g. lack of monophyly) to show that specimens from Paraguay represent a distinct population that would merit taxonomic recognition. Thus, we recognize a single species within the genus Sooretamys, named Sooretamys angouya. The pattern of morphological and genetic differentiation of Sooretamys could be the result of divergence with gene flow. However, our data also correspond in some aspects with the model advanced by Carnaval & Moritz, which claims the existence of stable Atlantic Forest areas where the forest biota persisted during the Quaternary climatic fluctuations. Whatever process has occurred, S. angouya represents one species with a complex evolutionary history, and the analysis of additional samples would be welcome to further elucidate the process of diversification of this taxon. © 2014 The Linnean Society of London
  • Editor: Blackwell Publishing Ltd
  • Idioma: Inglês
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  • Realização: ABCD-USP USP   Logos de Redes Sociais: Freepik

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