FIGURES 45–48 in New Amphicocconeis (Bacillariophyta) from Raivavae and Tahiti Islands (South Pacific) and Porto Belo (Brazil), with re-examination of Psammococconeis

FIGURES 45–48. Amphicocconeis antiqua sp. nov. SEM (material 'Papeete 4 Holothuria', from Tahiti, South Pacific). RV in internal view with RVVC still in place (abvalvar view) with dense rows of simple pores close to the edge of the copula (Fig. 45), foot pole of the RVVC (abvalvar view) with parallel endings around the raphe and helictoglossa (Fig. 46, twin arrowheads), detached RVVC in advalvar view (Fig. 47), RVVC in abvalvar view with radiate rows of simple pores and narrow edge void of pores (Fig. 48, arrow). Scale bars: 5 µm (Fig. 45), 4 µm (Fig. 47), 2 µm (Figs 46, 48).