Taxonomy and systematics of species of the tribe Akodontini (Rodentia: Cricetidae) from western Brazil

• Grant number: 19/05374-2
• Support Opportunities: Scholarships in Brazil - Doctorate
• Start date: August 01, 2019
• End date: July 31, 2023
• Field of knowledge: Biological Sciences - Zoology - Taxonomy of Recent Groups
• Principal Investigator: Alexandre Reis Percequillo
• Grantee: Marcus Vinicius Brandão de Oliveira
• Host Institution: Museu de Zoologia (MZ). Universidade de São Paulo (USP). São Paulo , SP, Brazil
• Associated research grant: 20/11444-0 - DIVERSITY OF NEOTROPICAL RODENTS (RODENTIA: SCIURIDAE, CRICETIDAE, ECHIMYIDAE): ORIGIN, EVOLUTION AND BIOGEOGRAPHY, AP.TEM

Abstract

Among the Sigmodontinae rodents, the tribe Akodontini represents the second largest in diversity, covering 16 genera and 85 species. Although widely distributed in South America, these rodents are absent trough most of Chile and southern Patagonia, and present a particular low diversity in Amazonia. The phylogenetic relationships of this tribe, as well as the delimitation of new genera and species, have been revealed through systematic revisions and recent molecular studies. However, for several taxa, a large part of the geographic coverage were not investigated yet. This is the case for Akodon and Thalpomys, genera that are phylogenetically close to each other, but with quite different diversification patterns: 38 valid species in Akodon and only two in Thalpomys. In Brazil this genera are present mainly in central and eastern regions, occupying Atlantic Forest and Cerrado areas, respectively. Nonetheless, there are records of these genera in western Brazil, in transitional areas between Cerrado, Pantanal and Amazonia. Conversely, specimens of such areas were rarely addressed in phylogenetic studies. This project aims to delimit, characterize and establish phylogenetic relations for Akodon and Thalpomys taxa that occur in western Brazil, using an integrative approach based on analysis of karyotypic, molecular and morphological data. The specimens from western Brazil will be compared to others from the geographic range of the referred genera, helping to increase knowledge on richness, diversification and biogeography of Akodontini in Brazil and South America, as well as the conservation of this transitional region, a poorly studied but very diverse area.

Scientific publications

(The scientific publications listed on this page originate from the Web of Science or SciELO databases. Their authors have cited FAPESP grant or fellowship project numbers awarded to Principal Investigators or Fellowship Recipients, whether or not they are among the authors. This information is collected automatically and retrieved directly from those bibliometric databases.)

BRANDAO, MARCUS VINICIUS; PERCEQUILLO, ALEXANDRE REIS; D'ELIA, GUILLERMO; PARESQUE, ROBERTA; CARMIGNOTTO, ANA PAULA. A new species of Akodon Meyen, 1833 (Rodentia: Cricetidae: Sigmodontinae) endemic from the Brazilian Cerrado. JOURNAL OF MAMMALOGY, v. 102, n. 1, p. 22-pg., 2021-03-17. (16/20055-2, 00/06642-4, 19/05374-2, 09/16009-1)

BRANDAO, MARCUS VINICIUS; BORONI, NATALIA LIMA; CARMIGNOTTO, ANA PAULA; PERINI, FERNANDO ARAUJO; SALLES, LEANDRO DE OLIVEIRA; PERCEQUILLO, ALEXANDRE REIS. The First Quaternary Record of the Rodent Akodon kadiweu Brandão, Percequillo, D'Elía, Paresque, & Carmignotto, 2021 (Rodentia: Cricetidae: Sigmodontinae). ZOOLOGICAL STUDIES, v. 61, p. 19-pg., 2022-12-29. (16/20055-2, 00/06642-4, 09/16009-1, 20/11444-0, 19/05374-2)

BRANDAO, MARCUS VINICIUS; CARMIGNOTTO, ANA PAULA; PERCEQUILLO, ALEXANDRE REIS; CHRISTOFF, ALEXANDRE UARTH; MENDES-OLIVEIRA, ANA CRISTINA; GEISE, LENA. A new species of Akodon Meyen, 1833 (Rodentia: Cricetidae) from dry forests of the Amazonia-Cerrado transition. Zootaxa, v. 5205, n. 5, p. 35-pg., 2022-11-10. (00/06642-4, 19/05374-2, 09/16009-1, 16/20055-2)