A new species of Oryzomys (Rodentia, Sigmondontinae) from southeast Brazil, with comments on the classification of the O. capito species group

Abstract

< O O l O g i C d j h m d gst heLinnean Society (l999), 12.5: 415-462. With 6 fiLgures Article ID: zjls, 1997.0165, available online at http://M.Mnv.idealibrary.rom on I Df bl @ a A new species of Oryzomys (Rodentia, Sigmondontinae) fiom southeast Brazil, with comments on the classification of the 0. cupito species group A new species of Olyzomys is described for the coastal Atlantic region of Brazil. Oryzomys seuanezi sp. nov. was collected in eight localities throughout the Atlantic Forest from the south of the State of Bahia to the State of the Rio de Janeiro, mostly in lowlands. Belonging to the 0. capito species group, 0. seuanezi differs from the other species by its karyotype equal 2n=48, FN=60. A morphometric analysis of populations of some species of the group indicates a split between the samples of the Atlantic Forest and those from 0. cupito from Cerrados and Amazon in relation to size, the former being larger. The population from Amazonia and from the Cerrados belongs to the same species, 0. goeldii being a synonym of 0. cupito. 0. seuanezi sp. nov. is the sister taxon of 0. onkcus, forming an Atlantic Forest clade. The close relationship of this group and some Peruvian populations of 0. cupito, probably a new species, is postulated. 0 1999 The Liiinean Socictv of London ADDITIONAL KEY WORDS:-karyosystematics ~ biogeography --morphometry ~ distributionphylogeny.

A New Species of Oryzomys (Rodentia: Muridae) from Eastern Bolivia

“…Weksler, personal commun., 2004). There remains ambiguity concerning the relationships of true laticeps, which is known only from its lectotype (Musser et al, 1998;Weksler et al, 1999). As we do not resolve this issue, we follow Musser et al (1998), Patton et al (2000), and Costa (2003) (Patton et al, 2000), and we here follow Costa (2003) in using a restricted definition of the megacephalus complex that excludes O. yunganus.…”

“…One of these, the megacephalus complex, includes at least four currently recognized species, O. megacephalus Fischer, 1814, O. perenensis Allen, 1901, O. laticeps Lund, 1840, and O. yunganus Thomas, 1902. Another named species, O. seuanezi Weksler, Geise, and Cerqueira, 1999, from the Atlantic forests of Brazil, includes the coastal populations designated as O. laticeps by Patton et al (2000) and Costa (2003;M. Weksler, personal commun., 2004).…”

The small mammals of the highly impacted North-eastern Atlantic Forest of Brazil, Pernambuco Endemism Center

“…However, it harbors an astonishingly high biodiversity, and new mammal species are still described (Weksler et al 1999, de Oliveira & Bonvicino 2002, Leite 2003, Mendes Pontes et al, 2006, Costa et al 2007). …”

Small non-flying mammals from conserved and altered areas of Atlantic Forest and Cerrado: comments on their potencial use for monitoring environment

“…The endemicity of small mammals is documented not only for the Atlantic Forest (Voss, 1993;Hershkovitz, 1998;Weksler et al, 1999) but also for the Cerrado biome (Gomes, 1991;Hershkovitz, 1990Hershkovitz, , 1993Hershkovitz, , 1994Palma & Yates, 1998;Bonvicino et al, , 1999 and the Cerrado and Caatinga biomes (Moojen et al, 1997;. The controversy regarding the taxonomy of Brazilian small mammals and the following difficulty for a correct identification of the species have been commented in conservation studies (Marinho-Filho et al, 1994).…”