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Systematic of the genus Holochius Brandt, 1835 (Rodentia, Sigmodontinae, Oryzomyini)

Grant number: 12/24099-3
Support type:Scholarships in Brazil - Doctorate
Effective date (Start): April 01, 2013
Effective date (End): September 25, 2017
Field of knowledge:Biological Sciences - Zoology
Principal Investigator:Alexandre Reis Percequillo
Grantee:Joyce Rodrigues Do Prado
Home Institution: Escola Superior de Agricultura Luiz de Queiroz (ESALQ). Universidade de São Paulo (USP). Piracicaba , SP, Brazil
Associated research grant:09/16009-1 - Systematics, evolution and diversification of the subfamily Sigmodontinae in South America: the tribe Oryzomyini, AP.JP
Associated scholarship(s):14/22444-0 - The clade D of tribe Oryzomyini and the phylogenetic relationships elucidation of genus Holochilus Brandt, 1835 (Rodentia, Sigmodontinae, Oryzomyini), BE.EP.DR


Oryzomyini is the most diverse tribe within the subfamily Sigmodontinae, and also the most widely distributed. The species present many habits, like terrestrial, scansorial, arboreal and even semi-aquatic, like the genus Holochilus. This genus has taxonomic problems and the phylogenetic relationships among its species remain unknown. The actual number of species of Holochilus possibly does not reflect the real diversity of the genus, considering morphological and cytogenetic evidence available. Some authors suggest that these new "species" have been recognized as valid by the lack of a large-scale review work with geographic and taxonomic approaches. Due to its wide distribution, the genus Holochilus also represents a key piece in understanding the evolution of oryzomine through open landscapes of South America, and the processes occured during the transition from the forested to open areas. Within this context, the aims of this project are to address issues concerning the number and distribution of Holochilus species, their phylogenetic relationships and biogeographic patterns. The path to the answers will be a detailed taxonomic revision, analyzing specimens deposited in scientific collections, and so, based on a morphological and molecular database, to establish the relationships among the species and to infer the mechanisms of diversification and biogeography. (AU)

Scientific publications
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
PRADO, JOYCE R.; PERCEQUILLO, ALEXANDRE R.; THOMAZ, ANDREA T.; KNOWLES, L. LACEY. Similar but different: Revealing the relative roles of species-traits versus biome properties structuring genetic variation in South American marsh rats. Journal of Biogeography, v. 46, n. 4, p. 770-783, APR 2019. Web of Science Citations: 0.
Academic Publications
(References retrieved automatically from State of São Paulo Research Institutions)
PRADO, Joyce Rodrigues Do. Evolutionary studies in South American marsh rats (Rodentia: Holochilus). 2017. Doctoral Thesis - Universidade de São Paulo (USP). Escola Superior de Agricultura Luiz de Queiroz Piracicaba.

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