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Some examples of pennate <strong>diatoms</strong><br />
generally raphed—capable of movement on substrate (1-20 µm s)<br />
solitary and benthic (in streams or wave washed shores of lakes) or epiphytic<br />
Gyrosigma<br />
Frustules raphed, valves sigmoid, raphe sigmoid with external proximal raphe ends recurved in opposite directions<br />
form one another. central area round to elliptical.<br />
A genus of benthic species, often in lakes and reservoirs.<br />
Around 100 microns long
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