Karenia selliformis
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| Taxonomic Group: | Dinoflagellate |
| Trophic Status: | Autotrophic |
| Size Range: | 19-28.5 μm wide x 19-26.6 μm long (LUMCON Guide); 16-30 μm wide x 20-30 μm long (Haywood et. al. 2004) |
| Key Characteristics: | Epitheca flattened or slightly conical and generally smaller than hypotheca; hypotheca centrally excavated, bilobed, and either saddle-shaped or rounded; nucleus is oval to elliptical to elongated reniform and occupies most of the upper middle hypotheca; several peripheral reniform chloroplasts (Haywood et al. 2004) |
| Confused With: | Karenia mikimotoi, which has a more slightly excavated hypotheca and a nucleus that is located in the left hypotheca |
| Toxin: | Unknown |