"' Astrorhizata "'is a class within the foraminifera that comprises those species with primitive unilocular, ( single chambered ), tests composed of aggulinated material or microgranular calcite.
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Pachyphloiid genera are characterized by their free, compressed, uniserial tests with broad low chambers recurved laterally and microgranular calcareous walls with secondary lamellar thickening on both sides which distinguishes them from the ancestral Geinitzinidae.
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The test wall is calcareous, finely perforate; primary wall indistinctly optically radial, as the calcite crystals are dendritic in form and occur in bundles; inner and outer surface of the wall covered by a microgranular veneer.
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"' Rotalidia "'comprises a class of Foraminifera where Foraminifera is regarded as a phylum, ( Kingdom Protista or Rhizaria, not Chromista ) that unites Foraminifera that have tests composed of secreted lamellar calcium carbonate, optically radial or granular calcite, or aragonite; separating them from those with porcelaneous, agglutinated, or microgranular, tests, or tests composed of organic compounds.
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