Eleven species of Lobocheilos are recognized from Java, Sumatra and Borneo, six of them new. Lobocheilos falcifer, L. lehat, L. bo, L. schwanenfeldii and L. kajanensis are rediagnosed. Tylognathus boides is a synonym of L. bo. Lobocheilos bo is definitively recorded only from the Mahakam and Kayan drainages in eastern Borneo, L. falcifer from Java, L. kajanensis from the upper Kayan drainage in eastern Borneo, and L. schwanenfeldii from Sumatra, Borneo and apparently Java; all records of these species from other areas are based on mis-identifications, unidentifiable juveniles, or require confirmation. Lobocheilos lehat is known only from two specimens collected around 1858 in Java and is possibly extinct; a lectotype is designated. Lobocheilos erinaceus is described from northwestern Borneo, L. ixocheilos from the Batang Hari drainage in Sumatra and the Kapuas drainage in Borneo, L. ovalis from Sarawak, Brunei and Sabah, L. tenura from the Kapuas drainage in southwestern Borneo, L. terminalis and L. unicornis from eastern Sabah. Lobocheilos unicornis is uniquely diagnosed by the presence on top of the head of a conspicuous median projection covered by small tubercles in females larger than 130 mm SL.
