FIGURES 77–89 in Three new Hantzschia species (Bacillariophyta) from the Maritime Antarctic Region

FIGURES 77–89. Hantzschia incognita. LM and SEM observations of the type population (Livingston Island, Hurd Peninsula, sample Π1a). Figs 77–85. Light micrographs showing a rather limited morphological variability. Fig. 86. External view of an entire valve showing the thickened ventral hyaline border and the grooves with the striae. Fig. 87. External detail of the central area with the continuous proximal raphe endings and the deep stria grooves. Fig. 88. Internal detail of the central area with the continuous proximal raphe endings. Fig. 89. Internal view of an entire valve showing the irregularly placed fibulae. Scale bar represents 10 μm except for figs 87 & 88 where scale bar = 1 μm.