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Genus: Thalassiosira | Diatom Common West Coast species: T. rotula, T. aestivalis, T. nordenskioldii, T. anguste-lineata Order: Biddulphiales Family: Thalassiosiraceae
Click on illustration to enlarge Description: Well-studied marine genus with over 100 species. Discoid cells are in chains or are embedded in mucilage (i.e. T. subtilis). Chain-forming species are connected by a central organic thread. Numerous spine-like threads also extruded from strutted processes on valve margins. Cell Size: Diameter (apical axis) = 3-186um Distribution: Widespread throughout the world's oceans. Images 3 and 4 of Thalassiosira punctigera, courtesy of W. Gurske. Collected at the Don Edwards Wildlife Refuge, Fremont CA.
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