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Description of Asterigerinacea

Rotaliine foraminifera, test trochospiral to nearly planispiral, chambers with internal partitions that form supplementary chambers around the umbilicus, producing a stellate pattern on the umbilical side; primary aperture interiomarginal, equatorial to umbilical in position, secondary sutural or areeal apertures; wall of hyaline perforate calcite, optically radial.


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Source: BioPedia

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