FIGURES 1–6 in New Amphicocconeis (Bacillariophyta) from Raivavae and Tahiti Islands (South Pacific) and Porto Belo (Brazil), with re-examination of Psammococconeis

FIGURES 1–6. Amphicocconeis disculoides. SEM (Brazilian material ICN n° 91485, Zimbros, Porto Belo, Brazil). SV in external view with short marginal striae (Fig. 1), SV areolae along the SV sternum (Fig. 2), SV oblong areolae with irregular aperture (Fig. 3), SV in internal view, with SVVC still in place with clusters of pores (Figs 5–6, twin arrowheads and arrow), RVVC (Fig. 4, arrow), and a part of the RV still attached (Fig. 4, arrowhead). Scale bars: 7 µm (Fig. 4), 6 µm (Fig. 1), 5 µm (Fig. 5), 1 µm (Figs 3, 6), 700 nm (Fig. 2).