FIGURES 22–25 in Mastogloia jahniae sp. nov., a new diatom (Bacillariophyceae) from the Baltic Sea coast of Sweden

FIGURES 22–25. SEM micrographs of Mastogloia jahniae sp. nov. Fig. 22. Tilted view of the external valve side showing girdle band (arrowhead). Fig. 23. Areolae structure and arrangement. Fig. 24. Internal valve side showing central nodule, raphe branches, siliceous ribs, septa and silicified costa-like interstriae. Fig. 25. Internal valve side showing silicified costa-like virgae and areola on the valve internal surface. Scale bars in Figs 22, 24, 5 µm, Figs 23, 25, 1 µm.