A new species, Echinogammarus navaensis , belonging to the berilloni-group has been found in the northern part of the Cordillera Cantábrica (Asturias). The morphological characters of this species are compared to those of other members of this group. In many localities, E. navaensis coexists with E. berilloni (Catta, 1878). A zonation in the distribution of the two species has not been found.