Leuctra canavensissp. n., endemic to a restricted south‐eastern section of the Graian Alps where it inhabits spring rivulets, is described for male and female. The description is supported by original drawings both of the new species, and of the closely relatedL. brevipennisRav. andL. vesulensisRav. and Rav. Dem. Owing to their morphology, ecology and geographical distribution, these species appear to belong to a well defined subgroup within theL. hippopusgroup.