Pseudo-nitzschia spp.

Click on image to view photo information.
   
   
 
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