Foraminifera
Science - Biology - Flora and Fauna - Protista - Foraminifera. Information from Wikipedia on these amoeboid protists with a test or shell, their diversity and life cycle and use as fossils in dating rocks. ...
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Radiolarian
Science - Biology - Flora and Fauna - Protista - Radiolaria. Information from Wikipedia on these amoeboid protozoa which form part of the marine plankton, with illustrations by Ernst Haeckel. ...