FIGURES 59–80 in Ten new Bacillariophyta species from James Ross Island and the South Shetland Islands (Maritime Antarctic Region)

FIGURES 59–80. Mayamaea tytgatiana sp. nov. LM & SEM pictures taken from the holotype population (sample D37) from Deception Island (South Shetland Islands). 59–76. LM views of 18 valves from the type population. Fig. 76 shows the girdle view. 77. SEM of an entire valve, external view. 78. SEM detail of the valve externally, showing the enlarged central raphe endings and rounded areolae with external hymenes. 79. SEM view of the valve mantle with the slit-like areolae (arrows) and the hooked, elongated distal raphe endings. 80. SEM of an entire valve, internal view. Scale bar represents 10 μm except for fig. 78 where scale bar = 1 μm and fig. 79 where scale bar = 2 μm.