New data on the genus Niphargus Schiödte, 1849 (Fam. Niphargidae) in Spain (Contribution to the Knowledge of the Amphipoda 294)

Summary. Niphargus ciliatuscis montanus Margalef, 1952, a poorly described and scarcely known taxon from the Cueva de Guesaltza (= Gesaltza) Cave, Guipuzcoa (= Gipuzkoa), Aranzazu (= Arantzazu), N Spain, is redescribed and figured here from new localities of N Spain. Based on relevant taxonomical characters, it is elevated to the rank of distinct species, Niphargus cismontanus Margalef, 1952. Its taxonomical characters and relation to some other Niphargus species from Spain and France are discussed