8.

Javan Thick-thumbed Bat

Glischropus javanus

French: Pipistrelle de Java / German: Java-Dickdaumenfledermaus / Spanish: Pipistrela de Java

Taxonomy. Glischropus javanus Chasen, 1939,

“south-west slopes of Mt. Pangrango, West Java, about 900-1000 metres,” Java, Indonesia.

This species is morphologically most similar to G. tylopus but its phylogenetic relationship is unknown and it may be a synonym of G. tylopus . Monotypic.

Distribution. Mt Pangrango in WJava.

Descriptive notes. Head-body 40 mm, tail 40 mm, forearm 32 mm (holotype).

The Javan Thick-thumbed Bat is most similar to the Common Thick-thumbed Bat ( Glischropus tylopus). Pelage is reddish yellow throughout, and face and ears are dark brown. Like other thick-thumbed bats,it has fleshy pale pads on thumbs, and also foot pads. It is most easily distinguished from the morphologically similar Common Thickthumbed Bat by its longer forearm. Skull is similar to the Common Thick-thumbed Bat in most cases and is significantly smaller than in the Indochinese Thick-thumbed Bat ( G. bucephalus); lower molars are nyctalodont.

Habitat. Found in a cultivated area close to montane forests. The type locality consists of evergreen forest with abundant bamboo. The holotype was collected at an elevation of ¢.900-1000 m.

Food and Feeding. No information.

Breeding. No information.

Activity patterns. Roosts pertaining to this species were reported in stalks of dead bamboo.

Movements, Home range and Social organization. No information.

Status and Conservation. Classified as Data Deficient on The IUCN Red List. The Javan Thick-thumbed Bat is known only from two specimens collected 70 years apart around the type locality: one specimen was captured in the 1930s, the other more recently. Virtually nothing is known of the species, and further research is required.

Bibliography. Csorba (2011), Csorba et al. (2015), Gorfol, Hutson et al. (2016), Menu (1987).