FIGURES 21–25 in Actinellopsis murphyi gen. et spec. nov.: A new small celled freshwater diatom (Bacillariophyta, Eunotiales) from Zambia

FIGURES 21–25. SEM images of valve exterior of Actinellopsis murphyi gen. et spec. nov. Figs 21–23. SEM images showing the external valve view. Fig. 24. SEM image of external girdle view showing epi and hypovalves with longer (L) and shorter (S) raphe slits External rimoportulae (R) opening indicated. Fig. 25. SEM image of the external girdle view of dorsal margin. Scale bar = 5 µm (21, 22, 23), 2 µm (24, 25).