Eucampia zodiacus
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Taxonomic Group: Diatom
Trophic Status: Autotrophic
Size Range: 24.0-42.5 μm wide x 28-48 μm long (LUMCON Guide); 10-61 μm wide (Cupp 1943, Horner 2002); 8-80 μm wide (Tomas 1997)
Key Characteristics: Cells slightly curved in broad girdle view, with two blunt horns that are usually short and broad; intercalary bands are not ribbed and are scarcely visible; chains helically coiled; chloroplasts numerous and small
Confused With: Eucampia cornuta, which has longer, thinner processes and numerous intercalary bands (ribs) that are usually visible in water mounts
Toxin: None known