Teleostei >
Cyprinodontiformes (Rivulines, killifishes and live bearers)
鱂形目 (Rivulines, killifishes and live bearers) >
Rivulidae (Rivulines)
溪鱂科 (Rivulines) > Kryptolebiatinae
Etymology: gracilis: The specific name gracilis (tenuous, small) is in reference to the small size of this psecies, the largest recorded specimen reaching about half the length of its congeners..
More on author: Costa.