Centric diatom frustule, SEM

Centric diatom frustule, SEM

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Caption: Coloured scanning electron micrograph (SEM) of marine centric diatom frustule (skeleton) (Arachnoidiscus ehrenbergii). This marine centric diatom is found in both brackish and salt water. Diatoms are a type of algae (Chromophyta, Bacillariophyceae). They consist of two valves, made of silica (hydrated silicon dioxide), which fit together like the top and bottom of a box. The exterior of the valves are often highly decorative, with pores, spikes or other types of projections. They are important alga in the marine food chain. Magnification: x60 when shortest axis printed at 25 millimetres.

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Keywords: 99288c, alga, algae, aquatic, arachnoidiscales, arachnoidiscus, bacillariophyceae, centric, colored, coloured, diatom, diatoms, ehrenbergii, electron, eukaryote, false-colored, false-coloured, frustule, heterokontophyta, marine, micrograph, phytoplankton, plankton, salt, scanning, sea, sem, silica, skeleton, spicule, spicules, sponge, sponges, water

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