Redescripción de eremoryzomys polius (Rodentia: cricetidae) y descripción de una nueva especie del género eremoryzomys

Translated title of the contribution: Redescription of Eremoryzomys polius (Rodentia: Cricetidae) and description of a new species of the genus Eremoryzomys

Angie C.J. Uturunco, Víctor R. Pacheco

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

Eremoryzomys polius (Osgood 1913) is an oryzomyine rodent endemic to the upper basin of the Marañón River in Peru, known from only 15 specimens at 7 localities and with no new records in at least 22 years. Here we report an expansion of the geographic distribution of E. polius by confirming its presence at four new locations near the Marañón River. In addition, we describe a new species of Eremoryzomys based on comparison of its morphological and morphometric characteristics with E. polius. The new species of Eremoryzomys differs from E. polius in the following traits: slightly bicolored and short tail; dark hind leg pads; thenar and hypothenar pads nearly contiguous; small skull with a short and gracile rostrum; well-developed nuchal ridge; short incisive foramen reaching the anterocone of M1; shorter molar series and triangular coronoid process. This new species is endemic to premontane Amazon forest of the middle basin of the Marañon River, adding support for the importance of this region as a center of endemism and as a focus for habitat conservation. Finally, we suggest that E. polius, as currently understood, remains a species complex.

Translated title of the contributionRedescription of Eremoryzomys polius (Rodentia: Cricetidae) and description of a new species of the genus Eremoryzomys
Original languageSpanish
Pages (from-to)483-503
Number of pages21
JournalMastozoologia Neotropical
Volume23
Issue number2
StatePublished - 2016

Bibliographical note

Funding Information:
Nuestro agradecimiento a los miembros del Departamento de Mastozoolog?a del Museo de Historia Natural, Universidad Nacional Mayor de San Marcos, especialmente a C. Barriga y P. S?nchez por su ayuda con el dise?o del mapa y a J. Pacheco y R. Barzega con las im?genes. As? mismo a C. Jim?nez, E. Vivar y N. Hurtado por sus comentarios, que fueron importantes durante el desarrollo de este estudio. Un especial agradecimiento al Dr. Bruce Patterson, por su gentileza al proporcionar fotos de Eremoryzomys polius de la colecci?n del Field Museum; as? como tambi?n al gerente del proyecto Estudio de Impacto Ambiental para la Prospecci?n S?smica 2D y Perforaci?n de 02 Pozos de Exploraci?n en el Lote 145 Zona 1, Alfonso Reynaga, de la consultora Environmental Resources Management (ERM), quien autoriz? el permiso para publicar los datos de colecta. Tambi?n a P. Velazco, investigador del AMNH, y C. Tello, investigador del MUSM, por haber tomado fotos y medidas craneanas de ejemplares de E.polius del American Museum of Natural History. Igualmente a E. Rengifo y N. Hurtado, investigadores del MUSM, por haber tomado fotos y medidas craneanas de ejemplares de E.polius del Museum of Vertebrate Zoology y The Field Museum respectivamente. A las bi?logas E. Arias y N. Vega por brindarnos informaci?n necesaria para la descripci?n del h?bitat de la nueva especie.

Publisher Copyright:
© SAREM, 2016.

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