Heliotheca tamesis
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| Taxonomic Group: | Diatom |
| Trophic Status: | Autotrophic |
| Size Range: | 70.3-130 μm wide x 88-210 μm long (LUMCON Guide); 26-160 μm wide x 56-120 μm long (Tomas 1997) |
| Key Characteristics: | Cells rectangular in broad girdle view except for occasional areas of torsion in relation to pervalvar axis; numerous chloroplasts that are broadly oval with a slight constriction, each with a pyrenoid |
| Confused With: | |
| Toxin: | None known |