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PUBLISHED BY THE AMERICAN MUSEUM OF NATURAL HISTORY CENTRAL PARK WEST AT 79TH STREET, NEW YORK, NY 10024
 

Summary: PUBLISHED BY THE AMERICAN MUSEUM OF NATURAL HISTORY
CENTRAL PARK WEST AT 79TH STREET, NEW YORK, NY 10024
Number 3509, 38 pp., 10 figures, 4 tables March 16, 2006
A New Montane Species of Spiny Pocket Mouse
(Rodentia: Heteromyidae: Heteromys) from
Northwestern Costa Rica
ROBERT P. ANDERSON,1,2
AND ROBERT M. TIMM3
ABSTRACT
Recent taxonomic works have recognized only two species of spiny pocket mice of the genus
Heteromys (Rodentia: Heteromyidae) from Costa Rica. Within Costa Rica, the widespread H.
desmarestianus is considered to occur throughout the wet Caribbean lowlands, as well as at middle
and high elevations on the Caribbean and Pacific slopes of the country's main montane systems. In
contrast, H. oresterus is known from only a few localities at high elevations in the western portion
of the Cordillera de Talamanca in central Costa Rica. Our morphological and morphometric
analyses of specimens from northwestern Costa Rica reveal the presence of an undescribed species
of the genus, which we describe as Heteromys nubicolens. This new species ranges from 750 to
1840 m in elevation in the Cordillera de TilaraŽn and Cordillera de Guanacaste. Heteromys
desmarestianus is found in the surrounding mesic lowlands and foothills. Externally, both species
possess dark brown dorsal pelage, but H. nubicolens differs by overall larger size and by distinctive

  

Source: Anderson, Robert P. - Department of Biology, City College, City University of New York

 

Collections: Environmental Sciences and Ecology