Ceratium macroceros
Click on image to view photo information.
Cerat_ma2.jpg Cerat_ma3.jpg
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