Geinitzinidae is an extinct family of Foraminifera 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.
| Geinitzinidae Temporal range:
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| Geinitzina fossil from the Permian period of Rote formation, Alborz province, Iran | |
Scientific classification 
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| Domain: | Eukaryota |
| Clade: | Diaphoretickes |
| Clade: | SAR |
| Phylum: | Retaria |
| Subphylum: | Foraminifera |
| Class: | †Fusulinata |
| Superfamily: | †Geinitzinacea |
| Family: | †Geinitzinidae Bozorgnia 1973[1] |
| Genera | |
References
edit- ^ Bozorgnia, F. (1973). Paleozoic foraminiferal biostratigraphy of central and east Alborz Mountains, Iran. National Iranian Oil Company, Geological Laboratories, Publication. 4: 1-185., available online at https://archive.org/details/Bozorgnia1973Searchable
- Alfred R. Loeblich Jr and Helen Tappan, 1988. "Forminiferal Genera and their Classification". Archived from the original on 16 June 2012. Retrieved 9 March 2013.
- Geinitzinidae Paleobiology Database, 9 March 2013