sentences:  In India four subfamilies (Arctopsychinae, Martynov 1924, Diplectroninae, Ulmer 1951, Hydropsychinae, Curtis 1835, Macronematinae, Ulmer 1905) have been reported so far which includes 15 genera and 128 species.Due to hydropsychid's presence in a wide range of rivers and streams worldwide, it has been favored as an indicator species.Some genera, sensitive to certain contaminants or pollutants, suffer declines in growth and/or survival.