Xenophyophorea is a clade of foraminiferans. Xenophyophores are multinucleate unicellular organisms found on the ocean floor throughout the world's oceans, at depths of 500 to 10,600 metres. They are a kind of foraminiferan that extract minerals from their surroundings and use them to form an exoskeleton known as a test.
Foraminifera are single-celled organisms, members of a phylum or class of Rhizarian protists characterized by streaming granular ectoplasm for catching food and other uses; and commonly an external shell of diverse forms and materials. Tests of chitin are believed to be the most primitive type. Most foraminifera are marine, the majority of which live on or within the seafloor sediment, while a smaller number float in the water column at various depths, which belong to the suborder Globigerinina. Fewer are known from freshwater or brackish conditions, and some very few (nonaquatic) soil species have been identified through molecular analysis of small subunit ribosomal DNA.
Gromia is a genus of protists, closely related to foraminifera, which inhabit marine and freshwater environments. It is the only genus of the family Gromiidae. Gromia are ameboid, producing filose pseudopodia that extend out from the cell's proteinaceous test through a gap enclosed by the cell's oral capsule. The test, a shell made up of protein that encloses the cytoplasm, is made up of several layers of membrane, which resemble honeycombs in shape – a defining character of this genus.
Globorotalia menardii is a perforate foraminiferan, about 1 millimetre (0.04 in) in size. It is a single-celled animal large enough to be seen with a naked eye and is found in the fossil record back to the Paleocene.
Allogromia is a genus of Foraminifera.
Elphidium williamsoni is a species of foraminiferans belonging to the family Elphidiidae. Elphidium williamsoni is found in abundance around the coasts of the UK, predominantly in the lower end of the coast.
Ammonia tepida is a benthic foraminifer living in the sediment of brackish waters. It is very similar to Ammonia beccarii, but the latter lives on the surface of red algae. Once considered a globally widespread taxon, a recent genetic and morphological study has revealed that many of what were once considered members of A. tepida in fact represent other species of Ammonia, primarily Ammonia veneta, with true specimens of A. tepida only being found in Atlantic waters, off the coast of the Americas.
Globigerinoides is an extant genus of shallow-water planktonic foraminifera of family Globigerinidae. First appearing in the Oligocene these foraminifera are found in all modern oceans. Species of this genus occupy the euphotic zone, generally at depths between 10-50m, in waters which cover a range of salinities and temperatures. They are a shorter lived species, especially when compared to Globorotalia genus. As a genus Globigerinoides is widely used in various fields of research including biostratigraphy, isotope geochemistry, biogeochemistry, climatology, and oceanography.
Stetsonia is a genus of Foraminifera with five species.
Spirocyclinidae is a family of foraminifera included in the order Loftusiida.
Cyclammina is a genus of foraminifers in the family Cyclamminidae. Most species are extinct, but there are a few that are extant.
Ammonia is a genus of marine foraminifers. It is one of the most abundant foraminifer genera worldwide and is found in sheltered, shallow marine intertidal environments, sometimes in brackish waters.
"Monothalamea" is a grouping of foraminiferans, traditionally consisting of all foraminifera with single-chambered tests. Recent work has shown that the grouping is paraphyletic, and as such does not constitute a natural group; nonetheless, the name "monothalamea" continues to be used by foraminifera workers out of convenience.
Linea is a genus of foraminifera belonging to the subfamily Rhabdammininae. It is a monotypic genus containing the sole species Linea simplex. It was described in 1989 from samples of foraminifera collected at the Nares Abyssal Plain. The test of the organism consists of a flexible unbranched tube, several centimiters long, with a diameter of around 80 μm.
Bruce William Hayward is a New Zealand geologist, marine ecologist, and author. He is known as a leading expert on living and fossil foraminifera.
Pseudotrochamminita are a genus of multichambered foraminifera, within the order of Lituolida.
Archaeostylus manukauensis is an extinct species of flax snail, a large air-breathing land snail, a terrestrial pulmonate gastropod mollusc in the family Bothriembryontidae.
Saccarena is a monotypic fossil genus of agglutinated benthic foraminifera described in 1969, belonging to the subfamily Saccorhizinae. It contains the sole species Saccarena bitubulifera. Its chronostratigraphic range is the Ludlovian, during the Upper Silurian.
Lamina is a monotypic fossil genus of agglutinated foraminifera belonging to the subfamily Ammomarginulinae. It contains the sole species Lamina irreperta, described in 1972.
Nummulitidae is a family of foraminifera in the order Rotaliida. It was described in 1827 by Henri Marie Ducrotay de Blainville.
