The phylogenetic position of the enigmatic Atlantic forest-endemic spiny mouse Abrawayaomys (Rodentia: Sigmodontinae)

Autor(es)

Ventura, Karen ^[1] ; Silva, Maria Jose J. ^[2] ; Geise, Lena ^[3] ; Leite, Yuri L. R. ^[4] ; Pardinas, Ulyses F. J. ^[5] ; Yonenaga-Yassuda, Yatiyo ^[1] ; D'Elia, Guillermo ^[6]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Inst Biociencias, Dept Genet & Biol Evolut, BR-05508090 Sao Paulo - Brazil

^[2] Inst Butantan, Lab Ecol & Evolucao, BR-05503000 Sao Paulo - Brazil

^[3] Univ Estado Rio de Janeiro, Inst Biol, Dept Zool, Lab Mastozool, BR-20550013 Rio De Janeiro - Brazil

^[4] Univ Fed Espirito Santo, Ctr Ciencias Humanas & Nat, Dept Ciencias Biol, Lab Mastozool & Biogeografia, BR-29075910 Vitori - Brazil

^[5] Ctr Nacl Patagon, Unidad Invest Diversidad Sistemat & Evoluc, RA-9120 Puerto Madryn - Argentina

^[6] Univ Austral Chile, Fac Ciencias, Inst Cs Ambientales & Evolutivas, Valdivia 5090000 - Chile

• Tipo de documento: Artigo Científico
• Fonte: ZOOLOGICAL STUDIES; v. 52, DEC 2013.
• Citações Web of Science: 8

Resumo

Background: The phylogenetic position of the sigmodontine genus Abrawayaomys, historically assigned to the tribe Thomasomyini or considered a sigmodontine incertae sedis, was assessed on the basis of nuclear and mitochondrial DNA sequences obtained from four individuals from different localities in the Atlantic forest of Brazil. Sequences of Abrawayaomys were analyzed in the context of broad taxonomic matrices by means of maximuml-ikelihood (ML) and Bayesian analyses (BA). Results: The phylogenetic position of Abrawayaomys differed depending on the gene analyzed and the analysis performed (interphotoreceptor retinoid-binding protein (IRBP) ML: sister to Thomasomyini; IRBP BA: sister to Akodontini; cytochrome (Cyt) b ML: sister to Neotomys; and Cyt b BA: sister to Reithrodontini). With the sole exception of the BA based on Cyt b sequences, where the Abrawayaomys-Reithrodon clade had strong support, all sister-group relationships involving Abrawayaomys lacked any significant support. Conclusions: As such, Abrawayaomys constitutes the only representative so far known of one of the main lineages of the sigmodontine radiation, differing from all other Atlantic forest sigmodontine rodents by having a unique combination of morphological character states. Therefore, in formal classifications, it should be regarded as a Sigmodontinae incertae sedis. (AU)

• Processo FAPESP: 09/54300-0 - Estudos de citogenetica comparativa e de sistematica filogenetica em roedores da tribo akodontini (cricetidae, sigmodontinae): o que pode ser revelado na era da citogenomica?
• Beneficiário: Karen Ventura
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado