Systomus xouthos, a new cyprinid fish from borneo,and revalidation of puntius pulcher (Teleostei: Cyprinidae)

Abstract

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. © 2011 by Verlag Dr. Friedrich Pfeil, München, Germany - ISSN 0936-9902.