Diatom pennate — Free Oceanography Illustration | GPAI | GPAI

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Diatom pennate — Free Oceanography Illustration | GPAI | GPAI

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Diatom pennate

Diatom pennate

Oceanography

Diatom pennate

Microscopic single-celled diatom shown enlarged as an elongated oval, pill-shaped, capsule-like, or boat-shaped form with clear bilateral symmetry. The cell is enclosed in a rigid, glass-like silica frustule composed of two overlapping halves or valves like a petri dish. The shell has crisp edges and fine ornamentation, including rows of tiny pores, parallel striations, etched lines, ribs, and delicate geometric patterning. Internal contents are visible through the translucent shell and appear pale gold, pale tan, or golden-brown.

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