Chrysochromulina throndsenii sp. nov. (Prymnesiophyceae). Description of a new haptophyte flagellate from Norwegian waters

Chrysochromulina throndsenii sp. nov. was isolated from the Norwegian Skagerrak coast using the serial dilution culture method. It has also been observed in Danish waters. Chrysochromulina throndsenii is a new representative of the small saddle-shaped Chrysochromulina species. It has two approximately equal and homodynamic flagella and a long coiling haptonema emerging subapically from the ventral side. One flagellum is autofluorescent in blue light. The cell body is covered by two scale types, both having spiral and radiating patterns of fibrils. In both scale types the ornamentation of the inner and outer scale faces is identical. The scales in the outer layer possess an upright rim.