Cyclotella spp.

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Taxonomic Group:Diatom
Trophic Status:Autotrophic
Size Range:3.5-67 μm diameter, depending on the species (Tomas 1997)
Key Characteristics:Cells usually solitary, with undulated or wavy valves; central field distinctly different from the rest of the valve
Confused With:Any of the simple pill-box type centric diatoms; broad rules of thumb are as follows: Cyclotella spp., have an undulated or wavy valve face in girdle view, and longitudinal ridges or lines directed toward the center in valve view
Toxin:None known