Hydropsyche instabilis, Oláh & Johanson, 2008

Oláh, J. & Johanson, K. A., 2008, Generic review of Hydropsychinae, with description of Schmidopsyche, new genus, 3 new genus clusters, 8 new species groups, 4 new species clades, 12 new species clusters and 62 new species from the Oriental and Afrotropical regions (Trichoptera: Hydropsychidae), Zootaxa 1802, pp. 1-248 : 160

Hydropsyche instabilis , new species cluster

Group comprises species with fused sclerotized endothecal processes, with variously developed lateral subapical projections and with digitiform apicoventral setose lobes. Without formal taxonomic designation this species cluster has been treated more comprehensively first as Hydropsyche fulvipes-isntabilis group ( Botosaneanu and Marinkovic-Gospodnetic, 1966), later as “ istabilis-fulvipes-siltalai ” species complex (Tobias, 1972) and recently as Hydropsyche instabilis group (Mlicky, 2001). One new species of the Hydropsyche pellucidula species cluster is described below.