98. Java Giant Mastiff Bat Otomops formosus French: Tadaride de Java / German: Java-Riesenbulldogfledermaus / Spanish: Otomops de Java Other common names: Java Free-tailed Bat, Java Mastiff Bat, Javan Mastiff Bat Taxonomy. Otomopsformosus Chasen, 1939, Tjibadak [= Cibadak], West Java Province, Indonesia. This species is monotypic. Distribution. Endemic to West Java Province, Indonesia, known only from two localities, Cibadak and Cibodas, in the Bogor area just S ofJakarta. Descriptive notes. Head-body 79-86 mm, tail 30-43 mm, ear ¢. 30 mm, forearm 59-60 mm; weight 26-27 g. Fur is short and velvety, deep blackish brown on head and back, paler on crown, with a distinct grayishbuff mantle with grizzled margins across neck and upper back; underparts are pale brown. Ears are large and finely covered with small horny points. Skin on forearm and ear membraneis furred. Habitat. Two males were observed (one collected) in a nesting hole of a barbet or woodpecker, in the dead limb of a rubbertree at Cibadak, at 400 m altitude, in 1938, and two males were collected from a tree hollow at Cibodas, at 1450 m altitude, in 1990. Cibadak now forms part of the urban area of Bogorcity; at the time of collection it was humid tropical forest and rubber plantations. Cibodas retains a large botanical garden and national park and the remaining habitat is volcanic, submontane, humid tropical forest. Food and Feeding. No information. Breeding. No information. Activity patterns. Java Giant Mastiff Bats have been found roosting in tree hollows. Movements, Home range and Social organization. TheJava Giant Mastiff Bat has been collected only twice, on both occasions as a pair of males that were found roosting together. Status and Conservation. Classified as Data Deficient on The IUCN Red List, because it is known from only four specimens, and has not been recorded since 1990. The number of mature individuals and threats are unknown. In addition to habitat loss, the species may be threatened by collecting, with taxidermized specimens purported to be Java Giant Mastiff Bats frequently listed for sale on online stores. Bibliography. Boeadi (1990), Chasen (1939), Kitchener, How & Maryanto (1992), Ralph et al. (2015).

Published as part of Don E. Wilson & Russell A. Mittermeier, 2019, Molossidae, pp. 598-672 in Handbook of the Mammals of the World – Volume 9 Bats, Barcelona :Lynx Edicions on page 659, DOI: 10.5281/zenodo.6418279