Thylamys pallidior (Didelphimorphia: Didelphidae)

Janet K. Braun, Nathan L. Pratt, Michael A. Mares

Research output: Contribution to journalArticlepeer-review

7 Scopus citations


Thylamys pallidior (O. Thomas, 1902) is a didelphid marsupial commonly called the white-bellied fat-tailed mouse opossum. A small mouse opossum, with tricolored pelage and a white venter, it has a seasonally incrassated tail, where fat deposits, primarily at the tail base, function in food storage. It is the most widely distributed species in the genus occurring from southwestern Peru and northern Chile southward along the eastern slopes of the Andes to southern Argentina. This species is found primarily in arid and semiarid habitats at elevations from sea level to about 4,500 m. It is not of special conservation status but may be uncommon in some areas.

Original languageEnglish (US)
Pages (from-to)90-98
Number of pages9
JournalMammalian Species
Issue number856
StatePublished - May 26 2010
Externally publishedYes


  • South America
  • didelphid
  • fat-tailed mouse opossum
  • marsupial
  • white-bellied fat-tailed mouse opossum

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics
  • Animal Science and Zoology


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