126 Petinomys lugensdistribution: This species is found only on three islands
in the Mentawai Archipelago: Siberut, Sipora and North
Pagai islands, off the western coast of Sumatra (Indonesia).
geographic variation: None.
conservation: IUCN status—endangered. Population
trend—decreasing.
habitat: The Siberut fl ying squirrel depends on tropical
and subtropical forests that are rapidly being removed for
agriculture and lumber. However, no details are available on
its distribution and habitat use. This species is thought to
occupy an area of less than 1200 km^2.
natural history: Nothing is known about the biology of
this species.
general references: Chasen and Kloss 1927; Francis and
Gumal 2008c; P. D. Jenkins and Hill 1982.
Petinomys mindanensis (Rabor, 1939)
Mindanao Flying Squirrel
description: The body and tail lengths of the Min da nao
fl ying squirrel are greater than those of all other congeners,
with the possible exception of Petinomys fuscocapillus. Com-
pared with P. crinitus, also found in the Philippines, P. minda-
nensis has a more rounded rather than a fl attened tail. During
World War II, the holotype of this species was destroyed.size: Female—HB 341.5 mm; T 388.3 mm.
Male—HB 323.8 mm; T 348.4 mm.
Sex not stated—HB 289.3 mm; T 295.8 mm.distribution: It is found on Dinagat, Siargao, and Min da-
nao islands (Philippines). On Mindanao Island it is reported
from the provinces of Bukidnon, Davao del Sur, Lanao del
Sur, Misamis Occidental, Misamis Oriental, and Zambo-
anga del Norte.geographic variation: None.conservation: IUCN status—least concern. Population
trend—no information.habitat: It is found in wet tropical and subtropical primary
forests, from 500 to 1600 m, but seems to be most common
at midelevation.natural history: More information is needed on the be-
havior, ecology, and reproduction of this species.general references: Chiozza 2008a; Hayssen 2008a;
Heaney and Rabor 1982; Heaney, Balete, et al. 1998; Musser
and Heaney 1992.Petinomys setosus (Temminck, 1844)
Temminck’s Flying Squirreldescription: This is a small fl ying squirrel. Specimens of
P. setosus to the north of the Isthmus of Kra diff er slightly
from those to the south, and this may justify subspecies sta-
tus. Specimens from the north are marginally larger in size,
and they usually have a white-tipped tail. Northern speci-
mens also have gray shoulders, a grizzled dorsum, white
cheeks, and a black eye ring with a black line continuing to
the nose. Those from the south have a blackish brown dor-
sum, a dark-colored patagium, and a blackish brown tail
with whitish, pink, or buff -colored basal fur. The cheeks are
gray, sometimes with a pinkish or yellowish wash. The
throat and anterior ventral surface are whitish. Based on the
sequence of the cytochrome b gene, this species is consid-
ered to be closely related to Hylopetes phayrei and Glaucomys
volans; analyses of numerous morphological traits support
the relationship with G. volans.