Pseudo-nitzschia delicatissima
No picture so far.
Forms stepped chains. Two chloroplasts, one in each end, are seen in the cells. The cells are linear to lanceolate in valve view, and lanceolate with cut-off ends in girdle view. The valves have an eccentric raphe with a central nodule. Each stria has two rows of poroids. A cingulum with three bands.
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Morphometrics; Apical axis (heteropolar) 19-76 µm, transapical axis 1.5-2.0 µm, 19-26 fibulae and 35-40 interstriae in 10 µm, 8-12 poroids in 1 µm. First girdle band with 43-48 poroids in 10 µm.
Can be confused with other taxa in the delicatissima-complex, like P. decipiens, P. arenysensis etc
Lundholm N, Moestrup Ø, Kotaki Y, Hoef-Emden K, Scholin C & Miller P. 2006. Inter- and intraspecific variation of the Pseudo-nitzschia delicatissima complex (Bacillariophyceae) illustrated by rRNA probes, morphological data and phylogenetic analyses. J. Phycol. 42:464-481.
Throndsen J. Hasle G.R. and Tangen K. 2007. Phytoplankton of Norwegian coastal waters. Almater Forlag AS. 341 pp
Distribution outside the Arctic: Cosmopolitan distribution from tropical to polar waters.