Pseudo-nitzschia spp.
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Taxonomic Group: Diatom
Trophic Status: Autotrophic
Size Range: 3.8-5.0 μm wide x 38-95 μm long (LUMCON Guide); 1-6.5 μm wide x 40-174 μm long (Horner 2002)
Key Characteristics: Long, sharp pennates that are most often found in step chains; two round chloroplasts on either side of a centrally located nucleus
Confused With: Possibly with Leptocylindrus minimus at first glance, which also have two chloroplasts, but which are more cylindrical and form chains by abutting valve faces
Toxin: Domoic Acid