Plate XXI, Figs I.1–I.6 – Type I (Spain, Cantabrian Cordillera, Palencia province, Río Carrión, Triollo, 1300 m). I.1, nymph, head and pronotum; I.2, tergites of macropterous ♂ nymph, dorsal view; I.3, mediodorsal setation on tergites of nymph, lateral view; I.4, femora of nymph; I.5, paraprocts of nymph; I.6, cerci of nymph, mediodorsal setation, lateral view. in Steps towards a revision of the Perla bipunctata Pictet, 1833 species complex (Plecoptera: Perlidae)

Plate XXI, Figs I.1–I.6 – Type I (Spain, Cantabrian Cordillera, Palencia province, Río Carrión, Triollo, 1300 m). I.1, nymph, head and pronotum; I.2, tergites of macropterous ♂ nymph, dorsal view; I.3, mediodorsal setation on tergites of nymph, lateral view; I.4, femora of nymph; I.5, paraprocts of nymph; I.6, cerci of nymph, mediodorsal setation, lateral view.