Home / Amoebae / Testate / Radiolarians |
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Radiolarians are amoeboid, and have a siliceous (opaline) test with radial symmetry. Fossils are as old as Paleozoic Period (600 million years old).
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Habitat: |
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Marine plankton
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References: |
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Stanley A. Kling, S.A., and D. Boltovskoy (2002) online. |