FIGURES 18–23. Licmophora graphis. SEM except Fig. 18 DIC. Fig. 18 in New species of benthic marine diatoms (Bacillariophyta) from the Western Pacific islands of Guam and Yap

FIGURES 18–23. Licmophora graphis. SEM except Fig. 18 DIC. Fig. 18. Living cells epiphytic on ectocarpoid phaeophyte filament, showing numerous small elliptical plastids clustered around the nucleus, GU44U-2. Figs 19–21. Holotype specimen whole mount on stub 718, GU44BJ-3: entire frustule and details of base and apex, showing change in stria density and presence of two apical rimoportulae (arrows). Figs 22, 23. Base and apex of specimen from GU80A-3. Scale bars: Figs 18, 19 = 10 µm, Figs 20–23 = 5 µm.