FIGURES 55–61 in New Amphicocconeis (Bacillariophyta) from Raivavae and Tahiti Islands (South Pacific) and Porto Belo (Brazil), with re-examination of Psammococconeis

FIGURES 55–61. Amphicocconeis ruatara sp. nov. (material RAI 20 from Raivavae, Austral Islands, South Pacific). RVs in external view (Figs 55–56), RV in internal view (Fig. 57), detail of the RV apex with terminal raphe fissure (Fig. 58), central area in external view (Fig. 59), head pole of the RVVC in advalvar view (Fig. 61), entire RVVC in advalvar view (Fig. 60). Scale bars: 3 µm (Figs 55–56, 60), 2 µm (Fig. 57), 1 µm (Figs 58–59, 61).