Smithstura paucicincta is a species of freshwater ray-finned fish belonging to the family Nemacheilidae, the stone loaches. It is only known from the Mae Nam Noi drainage, a tributary of the Salween River which forms the border between Thailand and Myanmar. This species inhabits streams with a moderate to fast current, in riffles, over beds varying from gravel to stone but it has also been recorded in small forest streams in very shallow water. This species reaches a maximum length of .
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