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A new species of Oryzomys (Rodentia, Muridae) from eastern Bolivia. American Museum novitates ; no. 3478

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dc.contributor.author Emmons, Louise
dc.contributor.author Patton, James L.
dc.date.accessioned 2006-01-12T17:08:43Z
dc.date.available 2006-01-12T17:08:43Z
dc.date.issued 2005
dc.identifier.uri http://hdl.handle.net/2246/5669
dc.description 26 p. : ill. (some col.), maps ; 26 cm. en
dc.description Includes bibliographical references (p. 25-26). en
dc.description.abstract Specimens of Oryzomys referable to the megacephalus complex (Musser et al., 1998) collected in the Parque Nacional Noël Kempff Mercado (PNNKM), eastern Bolivia, are discriminated from three other currently recognized species of that group (O. megacephalus, O. perenensis, O. laticeps) by analysis of cranial morphometrics and molecular sequence of the cytochrome b gene. The Bolivian sample has the closest genetic relationship to O. perenensis (Kimura 2-parameter genetic distance x 100: 14.8) and O. laticeps (distance 12.0), but the genetic distance is large. The Bolivian sample is clearly separated from the others by both principal component and discriminant function analyses of cranial and body variables. We here describe it as a new species. Morphologically, it is intermediate in size, along with O. perenensis, between the smaller O. megacephalus and the larger-bodied O. laticeps. In pelage color and occlusal pattern it closely resembles O. megacephalus. The geographic range appears to be a relatively small area of the western basin of the Río Itenez that drains easternmost Santa Cruz and Beni Departments. Genetically verified populations of the four species are thus far allopatric, with the known range of the new species wedged between the geographic ranges of O. perenensis to the west and O. megacephalus to the east. en
dc.format.extent 971850 bytes
dc.format.mimetype application/pdf
dc.language.iso en_US en
dc.publisher New York, NY : American Museum of Natural History en
dc.relation.ispartofseries American Museum novitates ; no. 3478 en
dc.subject.lcc QL1 .A436 no.3478, 2005 en
dc.subject.lcsh Oryzomys acritus -- Classification. en
dc.subject.lcsh Oryzomys -- Classification. en
dc.subject.lcsh Muridae -- Bolivia -- Parque Nacional Noel Kempff Mercado -- Classification. en
dc.subject.lcsh Rodents -- Bolivia -- Parque Nacional Noel Kempff Mercado -- Classification. en
dc.subject.lcsh Mammals -- Bolivia -- Parque Nacional Noel Kempff Mercado -- Classification. en
dc.title A new species of Oryzomys (Rodentia, Muridae) from eastern Bolivia. American Museum novitates ; no. 3478 en
dc.title.alternative New Oryzomys en
dc.type text en


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  • American Museum Novitates
    Novitates (Latin for "new acquaintances"), published continuously and numbered consecutively since 1921, are short papers that contain descriptions of new forms and reports in zoology, paleontology, and geology. New numbers are published at irregular intervals.

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