FIGURES 128–141. Chaetoceros didymus, Chaetoceros diversus. Figs 128–130, 133–134 in The planktonic diatom genus Chaetoceros Ehrenberg (Bacillariophyta) from the Adriatic Sea

FIGURES 128–141. Chaetoceros didymus, Chaetoceros diversus. Figs 128–130, 133–134: LM. Fig 131–132, 135, 138–139, 141: TEM. Figs 136–137, 140: SEM. Figs 128–132: Chaetoceros didymus field material. 128) Complete chain showing orientation of the setae. 129) Intercalary cells with two chloroplasts. 130) Valve view of the sibling valves with capilli. 131) Intercalary valve showing valve ornamentation. 132) Detail of a seta. Figs 133–134: Chaetoceros diversus field material. Figs 135–141 Chaetoceros diversus cultured material, strain PMFDIV1. 133) Complete chain with special setae. 134) Cells with a single chloroplast. 135) Two overlapped sibling valves showing valve ornamentation. 136) Sibling valves with fused projections (arrows). 137) External small projection of the rimoportula. 138) Rimoportula. 139) Detail of special intercalary seta. 140) Detail of a common seta. 141) Detail of the girdle band. Scale bars: 128, 133=20 μm; 129–130, 134=10 μm; 131=5 μm; 135–136, 138–141=1 μm; 132, 137=0.5 μm.