As published
in Nova Hedwigia.
 
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Scale bar for Figs 1-9, 11 in Fig. 6 = 10 µm, scale bar for Fig. 10 = 10 µm. 

FIGS 1-3 Melosira moniliformisvar. octogona
FIG. 1. Valve view. FIG. 2. Girdle view, high focus. FIG. 3. Girdle view, mid-focus. 

FIG. 4. Cyclotella caspia

FIG. 5. Thalassirosira weissflogii

FIG. 6. Ctenophora pulchella

FIGS 7-9 Achnanthes brevipes
FIG. 7. Girdle view of frustule. FIG. 8. Raphid valve. FIG. 9. Pseudoraphe valve. 

FIG. 10. Stauroneis javanica

FIG. 11. Navicula amphibolaf. rectangularis