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 Petinomys hageni (Jentink 1888) [Petinomys] hageni ( Jentink 1888 ) , Notes Leyden Mus ., 11: 26 . Type Locality: "Deli" [North East Sumatra , Indonesia ]. Vernacular Names: Hagen's Flying Squirrel . Synonyms: Petinomys ouwensi Sody 1949 . Distribution: Borneo, Sumatra . Conservation: IUCN – Lower Risk (lc). Discussion: Formerly included lugens ( Chasen, 1940:119 ) ; see comments therein. Medway (1977:112) considered the status of ouwensi doubtful.