Scanning electron micrograph of the internal siliceous skeleton of Radiolaria sp. Radiolaria are amoeboid protozoa. Around the skeleton, in a living organism, is an external layer of protoplasm from which radiate numerous pseudopodia, or false feet. Radiolaria are usually marine and planktonic. This specimen was collected in the Mediterranean ocean off the cost of Sicily Italy. Magnification: x200 when printed 10 cm wide.
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