FIGURES 54–62. Chaetoceros anastomosans. Culture material. Figs 54–55, 61 in The planktonic diatom genus Chaetoceros Ehrenberg (Bacillariophyta) from the Adriatic Sea

FIGURES 54–62. Chaetoceros anastomosans. Culture material. Figs 54–55, 61: strain PMFAN2. Figs 56–60, 62: strain PMFAN1. Figs 54, 55: LM. Fig. 56: SEM. Figs 57–62: TEM. 54) A chain. 55) Middle part of a chain showing a cross-bridge connection between sibling cells and the wide octagonal aperture. 56) Sibling valves in valve view. 57) Cell in girdle view showing the hyaline rim at the mantle ridge (arrow). 58) Valve face showing the central annulus and dichotomously branching costae. 59) Slit-shaped rimoportula on a terminal valve. 60) Part of the girdle. 61) Cross-bridge between sibling setae. Arrow shows the elongated poroid perforating the setae. 62) Detail of a seta. Scale bars: 54=20 μm; 55=10 μm; 57, 60–61=2 μm; 56, 58=1 μm; 59, 62=0.5 μm.