FIGURES 22–34 in Three new Hantzschia species (Bacillariophyta) from the Maritime Antarctic Region

FIGURES 22–34. Hantzschia zikmundiana. LM and SEM observations of the type population (Vega Island, sample VEGA-M2). Figs 22–30. Light micrographs showing a reduction in valve length. Fig. 31. External view of an entire valve showing the narrow ventral hyaline border and the shallow grooves with the rounded areolae. Fig. 32. External detail of the central area with the straight, interrupted, proximal raphe endings. Fig. 33. Internal detail of the central area with the interrupted proximal raphe endings. Fig. 34. Internal view of an entire valve showing the irregularly placed fibulae. Scale bar represents 10 μm except for figs 32 & 33 where scale bar = 1 μm.