Alexandrium pseudogonyaulax

A. pseudogonyaulax is a producer of goniodomin A

A. pseudogonyaulax is photosynthetic with central chloroplasts.

A. pseudogonyaulax is a medium sized cell which is dorso-ventrally flattened. The 1? plate is characteristically displaced and very short, almost pentagonal in outline. The ventral pore is semicircular in shape. The 1? plate is not in contact with the Po. The apical pore plate is oval shaped with a large comma shaped foramen and several irregular pores The cingulum is only weekly excavated. It is descending. Displacement is less than its width. The sulcus is not bordered by lists. The sa invades the epitheca slightly on the righthand side. It fits into a nothch formed by the 6? and 1? plates.

A. pseudogonyaulax is a medium-sized cell. Cells are wider than long. The 1? plate is characteristically displaced and very short, almost pentagonal in outline.