FIGURES 59–64 in Pinnularia baetica sp. nov. (Bacillarophyceae): Comparison with other panduriform species in the Mediterranean area

FIGURES 59–64. Pinnularia infirma Krammer. Scanning electron micrographs of the population collected in Ouiouane, Morocco. (59) external valvar view; (60) internal valvar view; (61) external view of the apex, showing the distal raphe hooked endings; (62) external central nodule bent on one side; (63) external rows of each alveoli; (64) Girdle view. Scale bars 5 μm (59–61); 1 μm (62–63); 10 μm (64).