Diatom alga, Coscinodiscus

Diatom alga, Coscinodiscus

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Caption: Light micrograph of the marine diatom Coscino- discus marginatus. The diatoms are a distinctive group of single-celled algae containing about 10,000 species. They form an important part of the plankton at the base of the marine and freshwater food chains. The characteristic feature of diatoms is their intricately patterned, glass-like cell wall, or frustule. The frustule consists of two halves which fit together like the lid and bottom of a box. It is often decorated with rows of tiny holes, known as striae, which are arranged either radially (as here) or on the 2 sides of a central axis. Magnification: unknown.

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Keywords: alga, algae, algal, botany, centric, coscinodiscus, coscinodiscus marginatus, diatom, diatoms, light micrograph, nature, phytoplankton, plankton, plant, shape, type

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