A review of bat research in Thailand with eight new species records for the country Author Bumrungsri, Sara Department of Biology, Prince of Songkla University, Hat Yai, Songkhla, Thailand, 90112 E-mail: sara. b @ psu. ac. th Author Harrison, David L. Harrison Institute, Bowerwood House, 15 St Botolph’s Road, Sevenoaks, Kent, TN 13 3 AQ, Great Britain Author Satasook, Chutamas Department of Biology, Prince of Songkla University, Hat Yai, Songkhla, Thailand, 90112 E-mail: sara. b @ psu. ac. th Author Prajukjitr, Amorn Department of Biology, Prince of Songkla University, Hat Yai, Songkhla, Thailand, 90112 E-mail: sara. b @ psu. ac. th Author Thong-Aree, Siriporn Peat Swamp Forest and Hala-Bala Wildlife Research Station, P. O. 6, Wang, Narathiwat, Thailand, 90160 Author Bates, Paul J. J. Harrison Institute, Bowerwood House, 15 St Botolph’s Road, Sevenoaks, Kent, TN 13 3 AQ, Great Britain text Acta Chiropterologica 2006 2006-12-01 8 2 325 359 journal article 21492 10.3161/1733-5329(2006)8[325:arobri]2.0.co;2 91cacb4e-dc01-4157-af9a-ebdc303ce86f 1733-5329 3944593 Hipposideros ridleyi Robinson and Kloss, 1911 Ridley’s leaf nosed bat Hipposideros ridleyi Robinson and Kloss, 1911: 241, Botanical Gardens, Singapore . New Material PSU-M05.12 (field no. SB030222), ♂ , 22 February 2003 , Wildlife Research Sta- tion, Bala Forest , Wang, Narathiwat Prov- ince, 05°47’45”N , 101°49’56”E , collected by S. Bumrungsri and members of the Hala- Bala bat research team. Taxonomic notes This is a medium-small hipposiderid bat, with a forearm length in the recent specimen of 47.9 mm ( Table 4 ) (47.2–49.8 mm in Francis et al. , 1999 b ). The pelage is dark brown on both the dorsal and ventral aspects ( Fig. 2a ). The ears are large and broad ( 23 mm long × 20 mm wide). The an- terior noseleaf, which lacks supplementary leaflets, is wide ( 7.8 mm ) and almost com- pletely covers the muzzle. The internarial septum is expanded into a large circular disc (diameter = 2.74 mm ). This clearly dif- fers from the ovoid shape of its sibling spe- cies, H. orbiculus , which is also known from peninsular Malaysia ( Francis et al. , 1999 b ). The narial lappets are well devel- oped and form a pocket encircling the nos- trils. The skull is elongated, with slightly elevated narial swellings. The first upper premolar (P2) is small and situated within the toothrow. Distribution and Ecological Notes Hipposideros ridleyi is currently known from peninsular Malaysia , Singapore , Bor- neo ( Sabah and Sarawak ) ( Simmons, 2005 ). This is the first confirmed record from Thailand . The voucher specimen from Thailand was captured together with a pregnant female (forearm length of 50.2 mm ) in a harp trap set along a nature trail in Ba- la Forest. The local area includes many streams, which join together and become a small peat swamp (2 ha in size). Much of the ground layer is densely covered with rattans and palms. The general habitat is pristine lowland evergreen forest at the elevation of 100 m a.s.l. and the topography is essentially flat. In peninsular Malaysia , a number of specimens was also collected from peat swamp forest and along trails in lowland dipterocarp forest ( Zubaid et al. , 1986 ). This habitat type is currently threat- ened throughout Southeast Asia. In Thai- land, breeding occurs as early as late Febru- ary. Females were lactating between April and May ( Kemper, 1988 ) and July in Bor- neo ( Francis et al ., 1999 b ). Medway (1969) suggested it may roost in caves, although there is no evidence to support this sugges- tion. It was found roosting in road culverts in peninsular Malaysia ( Gould, 1978 ). There are apparently no caves in the vicini- ty of the area of collection in Thailand .