Pseudo-nitzschia abrensis

Description:

(A and B) Light micrographs. (C–M) TEM micrographs. (A and B) Whole valves. (C and D) Part of the cell in valve view. (E) Detail of the central part of a valve showing the central nodule and the striae with a row of poroids split into two sectors (seldom three or four). (F) Part of a valve showing the central nodule and the poroid arrangement. (G) Detail of the poroid structure. (H) Central part of a valve. (I) Apical part of a valve showing the proximal and distal mantles. (J) Valve end. (K) Valvocopula. (L and M) Different cingular bands. (A–D, G–L) Strain Ner-J2. (E, F, and M) Strain Ner-J3.