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Modern Foraminiferal types - Calcarina

Calcarina

Modern Foraminiferal types - Calcarina

Diagram to show the mode in which successively formed chambers may completely embrace their predecessors, as in Frondicularia.

Successively Formed Chambers

Diagram to show the mode in which successively formed chambers may completely embrace their predecessors,…

The Foraminifera, ("Hole Bearers") or forams for short, are a large group of amoeboid protists with reticulating pseudopods, fine strands of cytoplasm that branch and merge to form a dynamic net. They typically produce a test, or shell, which can have either one or multiple chambers, some becoming quite elaborate in structure. These shells are made of calcium carbonate (CaCO3) or agglutinated sediment particles. About 275,000 species are recognized, both living and fossil. They are usually less than 1 mm in size, but some are much larger, and the largest recorded specimen reached 19 cm.

Foraminifera

The Foraminifera, ("Hole Bearers") or forams for short, are a large group of amoeboid protists…

"Diagrams of Foraminifera. A, monothalamian; B, C, polythalamian; D, horizontal, and E, F, vertical sections of the helicoid forms." -Whitney, 1911

Diagrams of Foraminifera

"Diagrams of Foraminifera. A, monothalamian; B, C, polythalamian; D, horizontal, and E, F, vertical…

Modern Foraminiferal types - Globigerina.

Globigerina

Modern Foraminiferal types - Globigerina.

Haliphysena Tumanvitzii; living specimen showing the wineglass-shaped shell built up of sand-grains and sponge-spicules, and the abundant protoplasm p, issuing from the mouth of the shell and spreading partly over its projecting constituents.

Haliphysena Tumanvitzii

Haliphysena Tumanvitzii; living specimen showing the wineglass-shaped shell built up of sand-grains…

An illustration of a heterostegina, a prehistoric foraminifera.

Heterostegina

An illustration of a heterostegina, a prehistoric foraminifera.

An illustration of a young imperforata with shell dissolved and protoplasm so as to show the seven nuclei.

Young Imperforata

An illustration of a young imperforata with shell dissolved and protoplasm so as to show the seven nuclei.

Modern Foraminiferal types - Orbulina.

Orbulina

Modern Foraminiferal types - Orbulina.

Modern Foraminiferal types - Polystomella

Polystomella

Modern Foraminiferal types - Polystomella

Modern Foraminiferal types - Rotalia

Rotalia

Modern Foraminiferal types - Rotalia