The First Quaternary Record of the Rodent Akodon kadiweu Brandão, Percequillo, D'Elía, Paresque, & Carmignotto, 2021 (Rodentia: Cricetidae: Sigmodontinae)

Author(s)

Brandao, Marcus Vinicius ; Boroni, Natalia Lima ; Carmignotto, Ana Paula ; Perini, Fernando Araujo ; Salles, Leandro de Oliveira ; Percequillo, Alexandre Reis

• Document type: Journal article
• Source: ZOOLOGICAL STUDIES; v. 61, p. 19-pg., 2022-12-29.

Abstract

Rodents of the genus Akodon comprise 41 extant species, and are considered the most diverse genus of the tribe Akodontini. The most recently described extant species is Akodon kadiweu, known exclusively from Serra da Bodoquena, a karstic region located in Mato Grosso do Sul state, Brazil. Some sub -fossil and fossil specimens of Akodon have been reported in recent years for Brazil, but most remain unidentified at the species level. Here we examine the identity of Quaternary specimens of Akodon sp. from the limestone cave Nossa Senhora Aparecida, located in Serra da Bodoquena. Quantitative characters allowed the distinction of Akodon sp. specimens from smaller and larger congeners, and skull qualitative characters of nasal, interorbital region, supraorbital margins, zygomatic notches, zygomatic plate, incisive foramina, mesopterygoid fossa, mandible and molars allowed to identify these individuals as A. kadiweu. Our results revealed the first known past representatives of Akodon to be recorded in Mato Grosso do Sul, as well as western Brazil. (AU)

• FAPESP's process: 16/20055-2 - Systematics and biogeography of the tribe Oryzomyini (Cricetidae: Sigmodontinae) in South America
• Grantee: Alexandre Reis Percequillo
• Support Opportunities: Scholarships abroad - Research
• FAPESP's process: 00/06642-4 - Small terrestrial mammals of the Cerrado bioma: local and regional faunistic patterns
• Grantee: Ana Paula Carmignotto
• Support Opportunities: Scholarships in Brazil - Doctorate
• FAPESP's process: 09/16009-1 - Systematics, evolution and diversification of the subfamily Sigmodontinae in South America: the tribe Oryzomyini
• Grantee: Alexandre Reis Percequillo
• Support Opportunities: Research Grants - Young Investigators Grants
• FAPESP's process: 20/11444-0 - Diversity of neotropical rodents (Rodentia: Sciuridae, Cricetidae, Echimyidae): origin, evolution and biogeography
• Grantee: Alexandre Reis Percequillo
• Support Opportunities: Research Projects - Thematic Grants
• FAPESP's process: 19/05374-2 - Taxonomy and systematics of species of the tribe Akodontini (Rodentia: Cricetidae) from Western Brazil
• Grantee: Marcus Vinicius Brandão de Oliveira
• Support Opportunities: Scholarships in Brazil - Doctorate