Cyclotella spp.
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| Taxonomic Group: | Diatom |
| Trophic Status: | Autotrophic |
| Size Range: | 3.5-67 ?m 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 |