FIGURES 11–21 in Three new Hantzschia species (Bacillariophyta) from the Maritime Antarctic Region

FIGURES 11–21. Hantzschia zidarovae. LM and SEM observations of the type population (Livingston Island, Byers Peninsula, sample LIV-BY16A). Figs 11–17. Light micrographs showing a reduction in valve length. Fig. 18. External view of an entire valve showing the thickened ventral hyaline border and the very deep grooves with the striae. Fig. 19. External detail of the central area with the deflected, interrupted, proximal raphe endings and the deep striae grooves. Fig. 20. Internal detail of the central area showing the external, interrupted proximal raphe endings. Note the groove under the raphe endings. Fig. 21. Internal view of an entire valve showing the irregularly placed fibulae. Scale bar represents 10 μm except for figs 19 & 20 where scale bar = 1 μm.