Order Rodentia - Family Sciuridae Author Wilson, Don E. Author Reeder, DeeAnn text 2005 The Johns Hopkins University Press Baltimore Mammal Species of the World: a Taxonomic and Geographic Reference (3 rd Edition), Volume 2 754 818 book chapter 0-8018-8221-4 10.5281/zenodo.7316535 Exilisciurus exilis (Müller 1838) [Sciurus] exilis Müller 1838 , Tijdschr. Nat. Gesch. Physiol., 5: 138 . Type Locality: Indonesia , Kalimantan , Kapuas River Basin, Tanah Laut (see Medway, 1977 , and Heaney, 1985). Vernacular Names: Least Pygmy Squirrel . Synonyms: Exilisciurus retectus (Thomas 1910) ; Exilisciurus sordidus (Chasen and Kloss 1928) . Distribution: Borneo and Banggi Isl. Conservation: IUCN – Lower Risk (lc).