Home / Dinophyceae /Photosynthetic / Alexandrium

  Home button    


Click on images for larger format

Name derivation:




Alexandrium  Halim  1960;  33 of 40 species descriptions are currently accepted taxonomically (Guiry and Guiry 2015).

Order Gonyaulacales   Family Goniiodomataceae


Cell has a median cinulum descending ~1 cingular width, and lacking horns and spines.  Usually a smooth thecal surface.  Large apical pore plate.  See more detail here.

No bioluminescence is known.

Similar genera:


Marine plankton;  often forms ‘red tide’ toxic blooms including saxitoxin that is ingested by shellfish, causing ‘paralytic shellfish poisoning (PSP) and requiring closure of shellfish harvesting while present.



Guiry, M.D. and G.M. Guiry  2013.  AlgaeBase. World-wide electronic publication, National University of Ireland, Galway.  http://www.algaebase.org; searched on 08 February 2013.