Beardless Barb Cyclocheilichthys apogon (Valenciennes, 1842) (Cypriniformes: Cyprinidae) in Madura Island, Indonesia

Beardless Barb Cyclocheilichthys apogon (Valenciennes, 1842) is a species known from Southeast Asia, including Western Indonesia area (Borneo, Sumatra and Java). In Java Island, it was previously found in the mainland area. This paper provides the first record of C. apogon in the Lembung River, one of the major rivers in Madura Island, thereby extending the species distribution up to 150 km northeast from the earlier record. The specimens of C. apogon were characterized as follows: dorsal fin rays 12; anal fin rays 8–9; pectoral fin rays 17–18; lateral line scales 34–35. A description of detailed morfological characters of a specimen are provided.