Browsing by Author "Weksler, Marcelo."
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Item The taxonomic status of Oligoryzomys mattogrossae (Allen 1916) (Rodentia, Cricetidae, Sigmodontinae), reservoir of Anajatuba hantavirus. (American Museum novitates, no. 3880)(American Museum of Natural History., 2017-05-02) Weksler, Marcelo.; Lemos, Elba R. Sampaio de; D'Andrea, Paulo Sérgio.; Bonvicino, Cibele R. (Cibele Rodrigues)Species of the cricetid genus Oligoryzomys are found across most Neotropical biomes, and several of them play important roles as natural reservoirs of hantaviruses and arenaviruses. Here we demonstrate that O. mattogrossae, previously considered a junior synonym of O. microtis, is a valid species, and that it is the oldest available name for specimens previously identified as O. fornesi from Brazil and northern Paraguay. Comparative morphology and phylogenetic analyses based on mitochondrial (cytochrome b) and nuclear (intron 7 of beta-fibrinogen) genes show that O. mattogrossae differs from its sister species O. microtis and from other forms of the genus, corroborating previously published karyological data. Oligoryzomys mattogrossae occurs in Cerrado and Caatinga habitats throughout central and northeastern Brazil and Paraguay, whereas distribution of O. fornesi is apparently restricted to southern Paraguay and northernmost Argentina. Specimens of O. mattogrossae were found to be the natural reservoir of the Anajatuba genotype of hantavirus in northeastern Brazil. Therefore, continuing efforts to delimit Oligoryzomys species and facilitate their identification are important for zoonotic monitoring.Item Ten new genera of oryzomyine rodents (Cricetidae, Sigmodontinae) ; American Museum novitates, no. 3537(New York, NY : American Museum of Natural History, 2006) Weksler, Marcelo.; Percequillo, Alexandre Reis.; Voss, Robert S.In order to achieve a monophyletic classification of oryzomyine rodents, 10 new genera are described for species or species groups previously referred to the polyphyletic genus Oryzomys. The following names are proposed: Aegialomys, n.gen. (for the "xanthaeolus group" of authors); Cerradomys, n.gen. (for the "subflavus group"); Eremoryzomys, n.gen. (for polius); Euryoryzomys, n.gen. (for the "nitidus group"); Hylaeamys, n.gen. (for the "megacephalus group"); Mindomys, n.gen. (for hammondi); Nephelomys, n.gen. (for the "albigularis group"); Oreoryzomys, n.gen. (for balneator); Sooretamys, n.gen. (for angouya); and Transandinomys, n.gen. (for bolivaris and talamancae). All of the new genera thus constituted are morphologically diagnosable and have distinct ecogeographic distributions. Pending revisionary work that is currently in progress by other researchers, six species belonging to the "alfaroi group" (herein construed as including alfaroi, chapmani, melanotis, rhabdops, rostratus, and saturatior) are provisionally referred to Handleyomys. As a result of these changes, the genus Oryzomys is restricted to the "palustris group" of authors, and the tribe Oryzomyini now comprises 28 genera.