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|Size Range:||2-3 μm wide (LUMCON Guide)|
|Key Characteristics:||Terminal cells usually narrower and longer than the intercalary cells, sometimes much longer; terminal cells also contain fewer gas vacuoles and less pigment, and thus sometimes appear empty; filaments often in large bundles|
|Confused With:||Anabaena species, which can sometimes be found in bundles, but the terminal cells are neither almost devoid of visible contents nor notably narrower than the central ones|
|Toxin:||Anatoxins, cylindrospermopsin, saxitoxins |