Isoperla acicularis subsp. acicularis

Isoperla acicularis acicularis (Despax, 1936) = Isoperla acicularis (Despax, 1936) in Lavandier (1979). TAXO / DIFF. I. acicularis was described by Despax (1936) from the Massif central. Then, Aubert (1956) described two subspecies exclusively reported in Spain and recognized by the scientific community (DeWalt et al. 2026). The individuals captured in the Estaragne watershed in 2022 correspond in every criteria to the nominal subspecies, I. acicularis acicularis (Fig. 2 E), also reported in the French Pyrenees (Opie-benthos 2026). We thus changed the name of the taxon in Lavandier’s dataset, accordingly (Table 2).