Chaetoceros affinis
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| Taxonomic Group: | Diatom |
| Trophic Status: | Autotrophic |
| Size Range: | 11.4-25 μm wide x 17.1-22.5 μm long (LUMCON Guide); 7-27 μm wide (Cupp 1943); 7-30 μm wide (Horner 2002; Tomas 1997) |
| Key Characteristics: | One chloroplast lying against broad side of girdle; adjacent cells touch at corners; terminal setae large, strongly divergent, perpendicular to chain axis then bent parallel to axis |
| Confused With: | |
| Toxin: | None known |