A = Cells on Chaetoceros diadema (A-D = BF, E = PC). All living cells.
Life-form: Solitary
Size: Apical axis = 32-49 µm, transapical axis =7-9 µm
Resting spore: -
Note: There are several similar taxa see Heimdal (1970)
Distinctive features: The size and the poorly developed intercostal membranes around the raphe.
Similar species:
Distribution: Coastal waters of Iceland and Norway, Gullmarsfjorden (common during the springbloom)
Literature:
Heimdal, B. R. 1970. Morphology and distribution of two
Navicula species in Norwegian Coastal waters. Nytt Magasin for
botanikk. 17: 65-75.