Translator Disclaimer
9 February 2017 The genus Abrawayaomys Cunha and Cruz, 1979 (Rodentia: Cricetidae: Sigmodontinae): geographic variation and species definition
Alexandre Reis Percequillo, Caryne Aparecida de Carvalho Braga, Marcus Vinicius Brandão, Edson Fiedler de Abreu-Júnior, Juliana Gualda-Barros, Gisele M. Lessa, Maria Rita Silvério Pires, Erika Hingst-Zaher
Author Affiliations +
Abstract

Abrawayaomys is a genus endemic to the Atlantic Forest with unique craniodental attributes within the radiation of sigmodontine rodents. Recent data hypothesized the existence of 2 species of Abrawayaomys, namely A. ruschii (from the Brazilian states of Espírito Santo, Rio de Janeiro, and São Paulo) and A. chebezi (from the Argentinean province of Misiones and the Brazilian state of Paraná), as well as a possible undescribed species (from the Brazilian state of Minas Gerais). Herein, based on a large series of recently collected specimens, we assessed the congruence between morphologic and molecular characters to search for discontinuities on these features across geography to delimit species within the genus, testing the aforementioned hypothesis. Morphological analyses, both qualitative and quantitative, showed that all characters are polymorphic throughout the geographic range of the genus. Results from phylogenetic analyses of cytochrome b (Cytb) data showed the topology (Misiones (Minas Gerais (São Paulo, Rio de Janeiro))), which is better explained as geographic rather than taxonomic variation, based on low values of genetic divergence observed between all specimens. Therefore, we reject the hypothesis of a polytypic Abrawayaomys, synonymizing A. chebezi to A. ruschii, and do not recognize specimens from Minas Gerais state as representing a distinct species.

© 2017 American Society of Mammalogists, www.mammalogy.org
Alexandre Reis Percequillo, Caryne Aparecida de Carvalho Braga, Marcus Vinicius Brandão, Edson Fiedler de Abreu-Júnior, Juliana Gualda-Barros, Gisele M. Lessa, Maria Rita Silvério Pires, and Erika Hingst-Zaher "The genus Abrawayaomys Cunha and Cruz, 1979 (Rodentia: Cricetidae: Sigmodontinae): geographic variation and species definition," Journal of Mammalogy 98(2), 438-455, (9 February 2017). https://doi.org/10.1093/jmammal/gyw228
Received: 27 June 2016; Accepted: 14 December 2016; Published: 9 February 2017
JOURNAL ARTICLE
18 PAGES


Share
SHARE
ARTICLE IMPACT
RIGHTS & PERMISSIONS
Get copyright permission
Back to Top