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LM micrograph showing assymmetric valve, and TEM micrographs showing mostly 4 rows of poroids, 2 outer rows of larger poroids and 2 inner rows of smaller poroids.
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Morphological details of P. australis
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TEMmicrograph showing central part of valve with central nodule, raphe canal with fibulae crossing, and striae with one row of poroids, each divided in several sectors.
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Culture based on material from La Gomera, Canary Islands
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(A) Light micrographs. (B–L) TEM micrographs. (A) Whole valve. (B and C) Complete valve of different shapes. (D) Detail of the central nodule and striae with a row of poroids split in several sectors. (E) Apical part of a valve. (F) Central part of a valve showing the central nodule, the poroid arrangement, and the proximal and distal mantles. (G) Detail of the poroid structure. (H and L) Detail of the valvocopula. (I–K) Different cingular bands. (A–C, F–H, J, and K) Strain Ner-F1. (D) Strain Ner-J6. (E, I and L) Strain Ner-G4.
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(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.
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Original nib drawing made by Frenguelli.
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Original nib drawing made by Frenguelli.
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Original nib drawing made by Frenguelli.
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Original nib drawing made by Frenguelli.
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Original nib drawing made by Frenguelli.
