FIGURES 24–29 in New Amphicocconeis (Bacillariophyta) from Raivavae and Tahiti Islands (South Pacific) and Porto Belo (Brazil), with re-examination of Psammococconeis

FIGURES 24–29. Amphicocconeis clypeus sp. nov. SEM (material 'Papeete 4 Holothuria', from Tahiti, South Pacific). RV in external view with interrupted macro-areolae delineating a large lunar-shaped area void of ornamentation (Fig. 24), note the eroded macro-areolae giving access to the abvalvar side of the RVVC with complex marginal pores (Fig. 29), RV in internal view with the RVVC still in place (Fig. 25), RV in internal view (Fig. 27), detail of the central area in internal view (Fig. 26), detail of the internal apex with unraised/low helictoglossa (Fig. 28). Scale bars: 5 µm (Figs 24, 27), 4 µm (Fig. 25), 2 µm (Figs 26, 28), 400 nm (Fig. 29).