The Geintizinacea comprises a superfamily of

Upper Devonian The Devonian ( ) is a geologic period and system of the Paleozoic era, spanning 60.3 million years from the end of the Silurian, million years ago (Mya), to the beginning of the Carboniferous, Mya. It is named after Devon, England, wher ...

Upper Permian The Permian ( ) is a geologic period and stratigraphic system which spans 47 million years from the end of the Carboniferous Period million years ago (Mya), to the beginning of the Triassic Period 251.9 Mya. It is the last period of the Paleoz ...

uniserial

fusulinids The Fusulinida is an extinct order within the Foraminifera in which the tests are traditionally considered to have been composed of microgranular calcite. Like all forams, they were single-celled organisms. In advanced forms the test wall was dif ...

(microgranular foraminifera with chambers aligned in a single row), the chamber walls consisting of a dark microgranular inner layer and radially fibrous outer layer. Advanced forms show secondary lateral thickening The Geinitzinacea differs from the

Nodosinellacea The Nodosinellacea is a superfamily of fusulinids (microganular foraminifera) in which the test is of one or more distinct chambers with the wall single layered or with a microgranular outer layer and fibrous inner layer. Differs from the Geinitzi ...

in that in the Nodosinellacea the inner layer is fibrous. Two families are included, the Geinitzinidae and Pachyphloiidae.

References

* * Alfred R. Loeblich Jr and Helen Tappan,1988. Forminiferal Genera and their Classification. Van Nostrand Reinhold. {{Taxonbar, from=Q5530156 Foraminifera superfamilies