(Alexandrium) (Alexandrium) is a biological genus in the family Goniodomataceae and order Gonyaulacales.
Alexandrium catenella
Alexandrium cohorticula
Alexandrium fundyense
Alexandrium minutum
Alexandrium monilatum
Alexandrium ostenfeldii
Alexandrium tamarense
Alexandrium
Gambierdiscus
Goniodoma
Heteraulacus
Pyrodinium