Sagnet, D., Van de Vijver, B. and Tudesque, L. (2022) Navicula similecataracta–rheni sp. nov. and N. aquitanonipponica sp. nov. (Bacillariophyta), two new species from Nouvelle–Aquitaine, Southwestern France – comparison with the related species N. cataracta–rheni Lange–Bertalot, N. cryptotenella Lange–Bertalot and N. sancti–naumii Levko et Metzeltin. Fottea 22(2): 211–227.