107.

Red-brown Pipistrelle

Hypsugo kitcheneri

French: Vespere de Kitchener / German: KitchenerZwergfledermaus / Spanish: Hypsugo de Kitchener

Taxonomy. Pipistrellus kitchener: Thomas, 1915,

“Boentok, Barito River [Central Kalimantan, Borneo]. Alt. 20’ [= 6 m].”

Hypsugo kitcheneri may be conspecific with H. lophurus, although the bacula of the two are morphologically distinct. Monotypic.

Distribution. NC, SW & SE Borneo; possibly in extreme N Borneo.

Descriptive notes. Head-body ¢. 56 mm, tail c. 41 mm, ear c. 14 mm, forearm 35-38 mm. Dorsal pelage of the Red-brown Pipistrelle is rich reddish brown (hairs with black bases); ventral pelage is slightly paler and grayer. Membranes are brown. Ears are short and subtriangular; tragus is broad and curved forward. Skull is moderately large and slightly broadened; rostrum is comparatively elongate; zygomatic arches are moderately thick with distinct postorbital processes; basioccipital pits are deep and distinct. C' is unicuspid; P? is small and intruded, I? has large posterior cusp; lower incisors are weakly or not imbricated; I, is slightly larger than I; and P, is slightly over one-half the area and two-thirds the height of P.

Habitat. Recorded from sea level to elevations of 1500 m.

Food and Feeding. No information.

Breeding. No information.

Activity patterns. No information.

Movements, Home range and Social organization. No information.

Status and Conservation. Classified as Data Deficient on The IUCN Red List. Virtually nothing is known regarding ecology and threats of the Red-brown Pipistrelle; further studies are needed. Recorded from Mount Palung and Kayan Mentarang national parks.

Bibliography. Francis & Hill (1986), Gorfol, Kingston & Hutson (2016), Medway (1977), Payne et al. (1985), Thomas (1915a).