FIGURES 15–19. Placoneis itamoemae, SEM. Fig. 15 in Morphology, ultrastructure and distribution of Placoneis itamoemae sp. nov. (Cymbellaceae) from Brazil

FIGURES 15–19. Placoneis itamoemae, SEM. Fig. 15. Overview of the valve, scale = 5 µm. Figs 16, 17. External view of central area showing the proximal raphe ends and central pores, scale = 1 µm. Figs 18, 19. Internal view of central area showing the proximal raphe ends and central pores, scale = 2 µm and 1 µm, respectively.Published as part of Straube, Arielli, Tremarin, Priscila Izabel, Castro-Pires, Emanuela Cristina De, Marquardt, Gisele Carolina & Ludwig, Thelma Alvim Veiga, 2013, Morphology, ultrastructure and distribution of Placoneis itamoemae sp. nov. (Cymbellaceae) from Brazil, pp. 55-62 in Phytotaxa 76 (3) on page 58, DOI: 10.11646/phytotaxa.76.3.13, http://zenodo.org/record/506675