Hemiaulus hauckii

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Taxonomic Group:Diatom
Trophic Status:Autotrophic
Size Range:12.5-17.1 μm wide x 90-122.5 μm long (LUMCON Guide); 12-35 μm wide (Cupp 1943, Tomas 1997); 15-35 μm wide (Horner 2002)
Key Characteristics:Cells ladder-like with long horns that end in claw-like spines; valve surface flat or slightly concave; apertures large and rectangular; cells united in straight or curved, often twisted chains; valve areolation usually indistinct
Confused With:Hemiaulus sinensis, which has shorter horns, a slightly convex valve surface, and valve areolation that is very distinct
Toxin:None known