FIGURES 30–34 in New Amphicocconeis (Bacillariophyta) from Raivavae and Tahiti Islands (South Pacific) and Porto Belo (Brazil), with re-examination of Psammococconeis

FIGURES 30–34. Amphicocconeis clypeus sp. nov. SEM (material 'Papeete 4 Holothuria', from Tahiti, South Pacific). RVVC in abvalvar view, with rows or irregular pores, with a large edge devoid of pores (Fig. 30, arrowhead), note the plow-sock (Figs 30, 33, arrows) at the head pole of the RVVC and marginal convex border (Figs 30–31), RVVC in advalvar view, with complex pores (Figs 32–33). Scale bars: 4 µm (Fig. 33), 3 µm (Fig. 30), 1 µm (Figs 31, 34), 600 nm (Fig. 32).