FIGURES 10–13 in Taxonomic revision and morphological cladistics analysis of the diatom genus Anorthoneis (Cocconeidaceae), with description of Anorthoneis arthus-bertrandii sp. nov.

FIGURES 10–13. Anorthoneis excentrica from Sterrenburg's sample 1 (1988), collected from the beach near Bergen aan Zee, Holland (August, 1958), SEM images. (10) External view of sternum valve showing faint eccentric sternum (arrow) and small, roundish terminal areas (arrowhead); (11) Detail of striae with smaller imperforated areola on the valve margin at the end of each stria (arrows); (12) External view of raphe-sternum valve with smaller areola at the end of each stria (arrows). (13) Internal view of raphe-sternum valve. Scale bars: Figs 10, 12, 13 = 10 μm; Fig. 11 = 2 μm.