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.