Rosa R. Jessen, R. Nathan Gwinn, John L. Koprowski
Mammalian Species 45 (903), 75-79, (13 December 2013) https://doi.org/10.1644/903.1
KEYWORDS: Brazil, French Guiana, lowland rain forest, Neotropics, Peru, pygmy squirrel, South America, Suriname
Sciurillus pusillus (É. Geoffroy Saint-Hilaire, 1803) is a sciurid commonly called the Neotropical pygmy squirrel. S. pusillus is an exceptionally small species of tree squirrel that appears pale gray due to a grizzled pattern of light hair tips on the dorsal pelage. Ranging from Amazonian Peru and Brazil northeast to the Guianas with a patchy distribution, S. pusillus is a denizen of the upper canopy of lowland rain forest. This species is listed as “Data Deficient” by the International Union for Conservation of Nature and Natural Resources.