4 NEW SPECIES OF FISHES FROM THE MIDDLE KAPUAS BASIN, INDONESIAN BORNEO (OSTEICHTHYES, CYPRINIDAE AND BELONTIIDAE)

Four new species were obtained in the middle Kapuas basin, Borneo, in or near Danau Sentarum Wildlife Reserve. Osteochilus partilineatus, ne w species, reaches a maximum known size of 54 mm SL and is distinguish ed from its congeners by having 10-11 branched dorsal-fin rays, 27-29 scales along lateral line, 12 circumpeduncular scales and a unique col our pattern of 4 dark longitudinal stripes on a yellowish body. Parach ela cyanea, new species, reaches a maximum known size of 50 mm SL and is characterized by having 36-38 lateral line scales, 23-26 branched a nal-fin rays, a bluish body in life and a dark vertical blotch at caud al-fin base. Rasbora tuberculata, new species, is distinguished by the presence of well developed tubercles on the back, the caudal peduncle , the dorsal fin and the upper caudal-fin lobe and by having a black s pot at the tip of the dorsal and anal fins. Betta enisae, new species, is distinguished by the presence of conspicuous broad subdistal black and blue margins in anal and lower caudal fins and altercating black and blue vertical bars on the caudal fin.