Domain Eukaryota Class Foraminifera Superfamily Geinitzinacea | Phylum Retaria Order Fusulinida Rank Family | |
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The Geinitzinidae is a family of Foraminifera (Protista) from the late Paleozoic (U Dev. - U Perm) included in the Fusulinida that comprises genera characterized by unserial tests (chambers arranged in a single row, or line, in which walls are double layered. The outer layer is of light colored hyaline (glassy) radial calcite. The inner layer is a dark, secreted, microgranular calcite.
References
Geinitzinidae Wikipedia(Text) CC BY-SA