Ephemera, 2017 (2018), tome 19 (2) : 71-81 (11 pages)

On the genus Heleniella Gowin, 1943 (extrema-gr.). I. H. gaultieri sp. n., a crenophilous species confined to glacial streams in Eastern Pyrenees (Diptera, Chironomidae, Orthocladiinae)

by Joel Moubayed-Breil & Pascal Gaultier