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Description of Nonionidae

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Rotaliine foraminifera, test planispiral, involute to evolute, biumbilicate, umbilici filled with pustules, aperture a low equatorial slit at the base of the apertural face, extending laterally nearly to the umbilici.
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Nonionidae

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The Nonionidae is a foraminifera family within the order Rotaliida and part of the Nonionacea, shells, or tests, of which are planispiral or trochospiral, calcareous and finely perforate. Includes the Nonioninae, Pulleniinae, Spirotectinae, and Astrononioninae.

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Nonionidae: Brief Summary

provided by wikipedia EN

The Nonionidae is a foraminifera family within the order Rotaliida and part of the Nonionacea, shells, or tests, of which are planispiral or trochospiral, calcareous and finely perforate. Includes the Nonioninae, Pulleniinae, Spirotectinae, and Astrononioninae.

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