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Diagnostic features

Boat shaped (or elongated leaf shaped) in valve view with fine parallel striae. The tips of the valve may be rostrate (appearing as if slightly squeezed and extended lengthwise) depending on species.  The striae on the valve surface are parallel or almost parallel throughout.  The raphe lies in a pronounced thick longitudinal strip of silica.  Each cell (when living) contains two golden-brown chloroplasts, one against each inside edge of the cell.

Typical habitats

The specimens photographed were from a lowland river


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