A = Chains; B = Central part with larger interspace (=arrow). (Dry preparation). (DIC)
Life-form: Cells united in chains
Size: Apical axis = 64-117 µm, transapical axis 4.5-6.5 µm
Resting spore:
Note: It can produce domoic acid (Rhodes et al. 1997)
Distinctive features: Valve view fusiform. Fibulae and central nodule distinct on cleaned valves on permanent mounts. Fibulae and striae equal in number.
Similar species: P. subfraudulenta
Distribution: Worldwide
Literature:
Hasle, G. R., Lange, C. B. & Syvertsen, E. E. 1996. A review of
Pseudo-nitzschia, with special reference to the Skagerrak,
North Atlantic, and adjacent waters. Helgoländer Meersunters.
50: 131-175.
Hasle, G. R. & Syvertsen, E. E. 1996. Marine diatoms. In: Tomas, C. R. (ed.) Identifying marine diatoms and dinoflagellates. Academic Press, Inc., San Diego, p. 5-385.
Rhodes, L., Scholin, C., Garthwaite, I., Haywood, A. & Thomas, A. 1998. Domoic acid producing Pseudo-nitzschia species educed bt whole cell DNA probe-based and immunochemical assays. In: Harmful Algae VIII (Reguera, B., Blanco, J., Fernández, M.L. & Wyatt, T. eds). Xunta de Galicia and Intergovernmental Oceanographie Commission of UNESCO 1998. pp. 274-277