FIGURES 103–111 in Taxonomic revision and morphological cladistics analysis of the diatom genus Anorthoneis (Cocconeidaceae), with description of Anorthoneis arthus-bertrandii sp. nov.

FIGURES 103–111. Anorthoneis tenuis specimens from Hustedt's cleaned material AM794, Beaufort, North Carolina, USA (Hustedt Diatom Collection, Bremerhaven, Germany), SEM images. (103) Tilted external view (60°) of sternum valve; (104) Sternum valve in internal view; (105) Detail of external sternum valve mantle showing smaller and transapically elongated areola at the end of each stria; (106) Detail of sternum valve mantle in internal view showing irregular areolae; (107) Tilted internal view (60°) of sternum valve; (108) Detail of coaxial, expanded, pore-like raphe central endings in external view; (109) Tilted external view (30°) of raphe-sternum valve with open valvocopula; (110) Tilted external view (60°) of raphe-sternum valve; (111) Detail of the raphe-sternum valve showing the biseriate mantle striae and a expanded, pore-like distal raphe ending. Scale bars: Fig. 107 = 5 μm; Figs 103, 104, 109, 110 = 2 μm; Figs 105, 106, 108, 111 = 1 μm.