Guinardia flaccida
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Taxonomic Group: Diatom
Trophic Status: Autotrophic
Size Range: 17.1-55 μm wide x 95-122.5 μm long (LUMCON Guide); 30-53 μm wide (Cupp 1943); 25-90 μm wide (Tomas 1997)
Key Characteristics: Cells cylindrical and single or united in close-set chains; valve surface nearly flat or very slightly concave; numerous chloroplasts that are lobed or star-shaped with one pyrenoid; sometimes the two ends of a cell will curl upward, like a squashed soda can
Confused With:
Toxin: None known