FIGURES 1–5 in Two new Orthoseira species (Bacillariophyceae) from lava tubes on Île Amsterdam and Big Island (Hawai΄i)

FIGURES 1–5. Orthoseira verleyenii Van de Vijver sp. nov. Light microscope images. Figs 1–2. Entire frustule showing the complete mantle and girdle structure. Fig. 3. View of two valves with focus on the linking spines. Fig. 4. Mantle edge with linking spines. Fig. 5. Detail of the mantle of two valves connected by linking spines. Scale bar represents 10 µm.