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Diagnostic features

Valves identical, each possessing a raphe (genus is biraphid). Boat shaped in valve view, rectangular in girdle view. Two longitudinal ribs run alongside the raphe from the centre to each end of the valve, where they merge to form an obvious tip.  Chloroplasts golden-brown.

Typical habitats

Our records are from clean water streams


Kingdom Chromista
Phylum Ochrophyta
Class Bacillariophyceae
Order Naviculales
Family Amphipleuraceae
Common name Diatoms