FIGURES 46–64 in Chamaepinnularia salina (Bacillariophyta), a new diatom species from French mineral springs (Massif Central)

FIGURES 46–64. Microcostatus turritus from Cave Bossea, Italy. LM. Figs 46–58. Population from Cave Bossea, Italy. SEM. Figs 59–64. Population from Cave Bossea, Italy. 59–62. External view of an entire valve showing the raphe structure and the microcostae. 63. Internal view of an entire valve showing the microcostae, the central nodule, the proximal and distal raphe endings. 64. Internal detail showing the striae. Scale bar = 10 μm (Figs 46–58), 4 µm (Fig. 63), 3 µm (Figs 59–62) and 500 nm (Fig. 64).