A review of the threadfin breams of the genusNemipterus (Nemipteridae) from Japan and Taiwan, with description of a new species

Species of the fish genusNemipterus (Nemipteridae) from Japan and Taiwan are reviewed. A key, diagnoses and synonymies are provided for 9 species, including a new species:N. aurora sp. nov. (previously misidentified asN. delagoae Smith);N. bathybius Snyder;N. furcosus (Valenciennes) [mistakenly referred to asN. peronii (Valenciennes)];N. hexodon (Quoy et Gaimard);N. japonicus (Bloch);N. peronii (Valenciennes) [previously referred to asN. tolu (Valenciennes), a junior synonym];N. thosaporni Russell [previously misidentified asN. marginatus (Valenciennes)];N. virgatus (Houttuyn); andN. zysron (Bleeker) [previously referred to asN. metopias (Bleeker), a junior synonym].N. aurora is described from specimens from Taiwan, the Gulf of Thailand, East Malaysia and Indonesia. It appears to be closely allied toN. bipunctatus (Ehrenberg) (N. delagoae is a junior synonym), an Indian Ocean species, but the two species are readily distinguished on the basis of colour pattern of the dorsal and anal fins:N. aurora has a broad orange-yellow submedial stripe along the dorsal fin, and a lemon submedial stripe on the anal fin; whereas inN. bipunctatus the dorsal fin is uniformly rosy, and the anal fin has 2–4 wavy yellow stripes.