Bats of the Sangkulirang limestone karst formations, East Kalimantan - a priority region for Bornean bat conservation Author Suyanto, Agustinus Museum Zoologicum Bogoriense, Widyasatwaloka Building, Jl. Raya Bogor Km 46, Cibinong 16911, Indonesia Author Struebig, Matthew J. School of Biological and Chemical Sciences, Queen Mary, University of London, London, E 1 4 NS, United Kingdom & Corresponding author: E-mail: m. struebig @ qmul. ac. uk m.struebig@qmul.ac.uk text Acta Chiropterologica 2007 2007-04-01 9 1 67 95 journal article 21493 10.3161/1733-5329(2007)9[67:botslk]2.0.co;2 d40d94a8-75f5-486c-a377-6c1c7ba067dc 1733-5329 3944605 Cynopterus brachyotis ( Müller, 1838 ) Short-nosed fruit bat New material 1♂ ( MZB M26818 ) . Records from Borneo Brunei : Bandar Seri Begawan, Pulau Berambang, Tasek Merimbun ( Kofron, 2002 ). Sabah : Binsuluk, Bonggaya, Danum Valley, Gomantong, Kinabatangan, Klias, Maliau Basin, Penampang, Pulau Ba- kungan, Pulau Balambangan, Pulau Banggi, Pulau Gaya, Pulau Malawali, Sepilok, Sungai Inarad, Sukau, Tabin, Tawau, Trus Madi (Yasuma and Andau, 2000); Crocker Range NP. Sarawak : Mulu NP (E. Ham- ilton-Smith, personal comm.); Kubah NP (I. Mackey, unpublished data); Gunung Pen- risen (Jayaraj et al ., 2006). WestKal: Betung Kerihun NP (Hariuchi, 1999); Gunung Niut NR ( Colijn, 2005 ); Gunung Palung NP ( Bhudel, 1996 ); Landak river, Sintang (RMNH). CentKal: Barito Ulu Research Area (McConkey and Chivers, 2004); Pasir Panjang, (near Pangkalan Bun), Palangka Raya (M. J. Struebig, unpublished data); Sebangau NP, Tanjung Puting NP ( Struebig et al ., 2006 b ); Teweh river (RMNH). East- Kal: Samarinda, Bukit Bangkirai, Wanariset Samboja (MZB); Kayan Mentarang NP (Mohd-Azlan et al ., 2003); Apau Kayan, Bukit Soeharto, Long Bangun, Long Ba- taoh, Tabang ( Yasuma, 1994 ). Comments Two males were captured in a mist-net set over the Tabalar river, and two females were captured in harp-traps set across a rudimentary trail in disturbed forest at the Marang formation. Cynopterus brachyotis is the most common fruit bat recorded in Borneo and throughout much of its range, as it is often caught in both mist-nets and harp-traps set in the understorey and is also common in agricultural and urban areas. Up to six divergent mitochondrial lineages exist across its range, with two sympatric, but morphologically and ecologically distinct, lineages known in Borneo ( Campbell et al ., 2004 ). The ‘Forest’ (FA 54.3–63.7 mm ) lineage appears to be confined to forested areas and may also include C. minutus (FA 52.9–61.9 mm ) described in Borneo by Kitchener and Maharadatunkamsi (1991), whereas the larger ‘Sunda’ lineage (FA 60–70 mm ) is common in more disturbed habitats. The two males captured in Tabalar ( 56.5–57.7 mm — Table 3 ) conform to the Forest lineage using Campbell et al .’s (2004) morphological criteria, but the two females captured at Marang (FA 59.4–60.1 mm) may represent either taxon. Further study of our single specimen together with the extensive collection of C. brachyotis at MZB is required to determine morphologi- cal characters that may distinguish them.