FIGURES 36–40. Chamaepinnularia salina Beauger, C.E in Chamaepinnularia salina (Bacillariophyta), a new diatom species from French mineral springs (Massif Central)

FIGURES 36–40. Chamaepinnularia salina Beauger, C.E.Wetzel, Allain & Ector sp. nov. Type population from Sail spring. SEM. 36. External detail of the central area and of the striae. Note the proximal raphe endings and the sternum. 37. External detail of the hooked distal raphe endings. 38, 40. Internal view of an entire valve showing the striae, the central nodule, the proximal and distal raphe endings. The proximal raphe endings are unilaterally hooked. The distal raphe fissures terminate internally with a small helictoglossa. 39. Internal detail showing the distal raphe endings. Internally, the areola openings are divided with internal plates of silica. Scale bar = 1 μm (Figs 36–37, 39), 5 µm (Figs 38, 40).