Hipposideridae Author Don E. Wilson Author Russell A. Mittermeier text 2019 2019-10-31 Lynx Edicions Barcelona Handbook of the Mammals of the World – Volume 9 Bats 227 258 book chapter http://doi.org/10.5281/zenodo.3739808 b7e93c79-44a6-4d9c-8b78-dcb62033fb0d 978-84-16728-19-0 3739808 83. Orbiculus Leaf-nosed Bat Hipposideros orbiculus French: Phyllorhine à petit disque / German: Kleinblatt-Rundblattnase / Spanish: Hiposidérido de disco pequeno Other common names: Orbiculus Roundleaf Bat Taxonomy. Hipposideros orbiculus Francis, Kock & Habersetzer, 1999 , “Abai Siat, SE Kota Baru, 01°02’ S , 101°43’ E , Sumatera Barat , Sumatra , Indonesia .” Hipposideros orbiculus was formerly included in the bicolor species group, but its position in the phylogeny is unclear and its taxonomy requires further study. Monotypic. Distribution. Peninsular Malaysia and Sumatra . Descriptive notes. Tail 26-34 mm, ear 20-23-5 mm, forearm 46-49 mm; weight 9-3-10-3 g. Ears of the Orbiculus Leaf-nosed Bat are large and rounded. Pelage is dark chocolate-brown. Noseleaf is broad and covers muzzle, with no lateral supplementary leaflet Intemarial septum is medium-sized and disk-shaped. Habitat The Orbiculus Leaf-nosed Bat appears to be a lowland-forest species. It has been captured in rubber plantations, in primary forest, and in peat-swamp forest. Food and Feeding. No information. Breeding. No information. Activity patterns. The Orbiculus Leaf-nosed Bat has been found roosting in drainage pipes. In Peninsular Malaysia , call frequency of 80 kHz has been recorded. Movements, Home range and Social organization. No information. Status and Conservation. Classified as Vulnerable on The IUCN Red List. The population status of the Orbiculus Leaf-nosed Bat is unknown, but is doubtless decreasing due to deforestation. Bibliography. Francis (2008a), Francis, Bates et al. (2016), Francis, Kock & Habersetzer (1999), Simmons (2005).