FIGURES 76–80 in Taxonomic revision and morphological cladistics analysis of the diatom genus Anorthoneis (Cocconeidaceae), with description of Anorthoneis arthus-bertrandii sp. nov.

FIGURES 76–80. Anorthoneis hyalina specimens from Hustedt's cleaned material AM791, AM794, Beaufort, North Carolina, USA (Hustedt Diatom Collection, Bremerhaven, Germany), SEM images. (76) External view of sternum valve showing the asymmetrical hyaline central area; (77) Internal view of sternum valve with thickened hyaline central area; (78) Tilted external view (60°) of sternum valve; (79) Detail of sternum valve surface showing imperforated areolae (arrow); (80) Detail of sternum valve mantle in internal view showing the slit-like areolae occluded by vela. Scale bars: Figs 76, 77 = 10 μm; Fig. 78 = 5 μm; Figs 79, 80 = 2 μm.