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created and filled by Brian Ottway, Michael Hesemann and Werner Baubkus.
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The most important parts of the foraminiferid cell are enclosed within an inner shell called test. It is variously composed of secreted organic matter (tectin), secreted minerals (calcite, aragonite or silica) or of agglutinated particles. This test consists of a single (unilocular)chamber or multiple (multilocular) chambers mostly less than 1 mm across and each interconnected by one or several openings called foramen/foramina.
 Part systematics  Chapter introduction  Section basic terms

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