Maurice Kottelat’s research while affiliated with National University of Singapore and other places

Schistura crocotula, a new species, is described from Khanan River, Prachuap Khiri Khan Province, southern Thailand. It is distinguished from other species of Schistura in Southeast Asia by a depressed head; 6-11 dark brown bars against an orange background; the first bar is the widest, two bars are under dorsal fin; interspaces are often indistinct on posterior part of body; a thick black bar at the base of the caudal fin.

Systomus xouthos, new species, is described from Belait and Tutong drainages in Brunei. It is distinguished by the adults having a plain brown body with a blackish reticulate pattern; the juveniles with a faint black spot at dorsal-fin origin and a midlateral series of 3 or 4 black blotches on the flank; a black band across dorsal fin; 12 scale rows around the caudal peduncle; a deeply forked caudal fin with long pointed lobes; and the dorsal and anal fins with a concave posterior margin. Systomus pulcher from eastern Borneo is revalidated from the synonym of S. tetrazona.

Rasbora atranus, new species, is described from the upper Mahakam drainage, central Borneo. It belongs to the R. sumatrana-elegans complex (sensu Brittan, 1954). It is distinguished by having a dark midlateral stripe from the opercle to the caudal-fin base, often faint or poorly contrasted, widened in a faint elongated triangular blotch at the end of the caudal peduncle; by the presence of a conspicuous oval to triangular black blotch along the anterior half of the anal-fin base; by the fins orange in life.

Crossocheilus elegans, new species, is described from the Kinabatangan and Segama drainages in Sabah, northern Borneo. It is distinguished from all other species of the genus by its colour pattern consisting of a blackish midlateral stripe extending from the tip of the gill opening to the middle of the base of the caudal fi n, separated from the dark brown dorsum by a pale yellowish-brown stripe.