Thryssocypris T.R.Roberts & Kottelat 1984

Key to species of Thryssocypris 1a. Origin of dorsal fin over or in front of origin of anal fin, 14–15 circumpeduncular scales........ Thryssocypris smaragdinus 1b. Origin of dorsal fin behind origin of anal fin, 16–17 circumpeduncular scales...................................... 2 2a. 37–40 lateral-line scales....................................................... Thryssocypris wongrati sp. nov. 2b. 42–46 lateral-line scales................................................................................ 3 3a. Black spot on caudal-fin base, hyaline caudal fin with black on proximal portion of medial caudal-fin rays............................................................................................. Thryssocypris tonlesapensis 3b. No dark spot on caudal-fin base, yellowish caudal fin without black on medial rays........... Thryssocypris ornithostoma
Published as part of Grudpan, Chaiwut & Grudpan, Jarungjit, 2012, Thryssocypris wongrati, a new anchovy-like cyprinid (Cypriniformes) from the Chao Phraya basin, Thailand, pp. 228-235 in Zootaxa 3586 on page 234