Geinitzinidae

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: Late Devonian–Late Permian PreꞒ Ꞓ O S D C P T J K Pg N
Geinitzina fossil from the Permian period of Rote formation, Alborz province, Iran
Scientific classification
Domain:	Eukaryota
Clade:	Sar
Clade:	Rhizaria
Phylum:	Retaria
Subphylum:	Foraminifera
Class:	†Fusulinata
Superfamily:	†Geinitzinacea
Family:	†Geinitzinidae Bozorgnia 1973[1]
Genera
Geinitzina Eonodosaria Frondilina Howchinella Lunucammina Spandelinoides