Pseudo-nitzschia calliantha Lundholm, Moestrup and Hasle  

Pseudo-nitzschia calliantha is a domoic-acid-producing, pennate diatom. However, not all strains of this species are toxin-producers. Compared to other Pseudo-nitzschia species it does not produce high levels of domoic acid. It is often found in coastal regions and can form monospecific blooms.