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A new species of the rodent genus Oecomys (Cricetidae, Sigmodontinae, Oryzomyini) from eastern Bolivia, with emended definitions of O. concolor (Wagner) and O. mamorae (Thomas). (American Museum novitates, no. 3661)

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dc.contributor.author Carleton, Michael D.
dc.contributor.author Emmons, Louise.
dc.contributor.author Musser, Guy G.
dc.date.accessioned 2009-09-04T15:00:07Z
dc.date.available 2009-09-04T15:00:07Z
dc.date.issued 2009
dc.identifier.uri http://hdl.handle.net/2246/5984
dc.description 32 p. : ill. (1 col.), 1 map ; 26 cm. "August 28, 2009." Abstract also in Spanish. Includes bibliographical references (p. 27-30). en
dc.description.abstract We describe a new species of Oecomys, O. sydandersoni (Cricetidae: Sigmodontinae), from the Parque Nacional Noel Kempff Mercado in eastern Bolivia. One of its diagnostic traits, a derived carotid circulatory plan, provides morphological evidence for its close relationship to O. concolor and O. mamorae among the 15 species of Oecomys currently recognized. Notwithstanding this shared trait, other morphological contrasts and morphometric analyses demonstrate the sharp differentiation of the eastern Bolivian form from both of those species. Oecomys sydandersoni, n. sp., is arboreal and was encountered above ground on limbs and woody vines only in densely wooded hummocks scattered through grassland, in contrast to adjacent closed tropical deciduous forest where three other species of Oecomys (O. bicolor, O. roberti, O. trinitatis) were obtained. The new species represents the fourth sigmodontine rodent to be named from this restricted region within eastern Bolivia since 1999. Its documentation served as a platform to summarize the nomenclatural history, morphological recognition, and geographic distribution of O. concolor (Wagner, 1845) and O. mamorae (Thomas, 1906) based on fresh examination of all type material and museum specimens. en
dc.format.extent 5455010 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. 3661. en
dc.subject Oecomys sydandersoni. en
dc.subject Oecomys concolor. en
dc.subject Oecomys mamorae. en
dc.subject Rodents. en
dc.subject Bolivia. en
dc.subject Parque Nacional Noel Kempff Mercado. en
dc.title A new species of the rodent genus Oecomys (Cricetidae, Sigmodontinae, Oryzomyini) from eastern Bolivia, with emended definitions of O. concolor (Wagner) and O. mamorae (Thomas). (American Museum novitates, no. 3661) en
dc.title.alternative New species of Oecomys. en
dc.type Book 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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