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Diatoma | Ohio Sea Grant

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Diatoma

Diatoma cells form zig-zag chains and are often found attached to submerged structures (like rocks, concrete, and dock posts).

Genus: Diatoma

Diatom

Diatoma cells form zig-zag chains and are often found attached to submerged structures (like rocks, concrete, and dock posts). Diatoma can also grow attached to Cladophora. Diatoma and Tabellaria look similar, but Tabellaria has prominent septa in the cells (which look like lines going through the center of each cell). Tabellaria is planktonic whereas Diatoma is benthic.