title: A review of the glyptosternine catfish genus Exostoma Blyth 1860 from Thailand, with descriptions of two new species (Teleostei: Siluriformes).
abstract: We review members of the sisorid catfish genus Exostoma known from Thailand. Three species are recognized, of which two from the headwaters of the Chao Phraya River drainage in northwestern Thailand, are described here as new: E. effrenum and E. peregrinator. In addition to the two new species, E. berdmorei (which is here redescribed) is also known from the Salween River drainage in western Thailand. The three species can be distinguished from each other and other congeners by the morphologies of the adipose and caudal fins, as well as morphometric data for the eye diameter, head width, dorsal-to-adipose distance, body depth at anus, caudal-peduncle length, caudal-peduncle depth, and numbers of branched pectoral-fin rays and preanal vertebrae.
authors.affiliation: c/o Lee Kong Chian Natural History Museum, 6 Science Drive 2, #03-01, Singapore 117546.; Email: heokhee.ng@gmail.com.
authors.forename: Heok Hee
authors.initials: HH
authors.lastname: Ng
authors.affiliation: Mekong River Commission, 184 Fa Ngum Road, Unit 18 Ban Sithan Neua, Vientiane 01000, Lao PDR.; Email: chavalit@mrcmekong.org.
authors.forename: Chavalit
authors.initials: C
authors.lastname: Vidthayanon
mesh_terms: D000818:Animals; D002397:Catfishes / Q000033:anatomy & histology* / Q000145:classification*; D045483:Rivers; D013785:Thailand