Ceratium macroceros

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Taxonomic Group:Dinoflagellate
Trophic Status:Autotrophic
Size Range:45-55 μm wide x 50-60 μm long (Dodge 1982); 45-55 μm wide x up to 400 μm long (Horner 2002)
Key Characteristics:Angular box-like body that abruptly forms an offset apical horn directed to the right; left and right hypothecal horns formed abruptly from body; left horn curves anteriorly, right horn bends to the right and almost parallels the apical horn
Confused With:At first glance, with Ceratium tripos, which has a more robust body and hypothecal horns
Toxin:None known