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Quinqueloculina sp. from Donegal Bay, Ireland.
Scientific classification
Domain: Eukaryota
Kingdom: Rhizaria
Superphylum: Retaria
Phylum: Foraminifera
Order: Miliolida
Superfamily: Miliolacea
Family: Miliolidae
Subfamily: Quinqueloculininae
Genus: Quinqueloculina
d'Orbigny, 1826

Quinqueloculina is a protistan genus, sometimes referred to the Rhizaria, included in the foraminiferal family Miliolidae.

As with all miliolids the test of Quinqueloculina is composed of imperphorate, porcelaneous calcite, often giving them a yellowish tint. As with the Miliolidae the chambers are arranged in various planes, with two chambers per whorl. In Quinqueloculins the chambers are in planes set 72 deg. apart, but successive chambers are in planes separared by 144 degrees. The name Quinqueloculina comes from the Latin for five. In Quinqueloculina five chambers are exposed to view on the outside, although the earlier three are sandwiched between the later two, one on one side, two on the other. Chambers are generally long and tubular, normally without integral floors, that function made by the underlying chamber.

Some 30 or more species of Quinqueloculina have been named.

Quinqueloculina is found in abundance around the coasts of the UK[1] High concentrations of one species of Quinqueloculina within the Celtic Sea are interpreted as a seasonal indicator of strong vertical mixing in that water body.

See also[edit]


  • Cushman Joseph A 1950 Foraminifera, their classification and economic use (4th ed) Harvard University Press, Cambridge Mass
  • Alfred R. Loeblich Jr and Helen Tappan, 1964. Sarcodina Chiefly "Thecamoebians" and Foraminiferida; Treatise on Invertebrate Paleontology, Part C Protista 2. Geological Society of America and University of Kansas Press.
  • ____ 1988. Forminiferal Genera and their Classification. E-book


  1. ^ Horton, Edwards, and Lloyd, 1999.UK intertidal foraminiferal distributions: implications for sea-level studies. Marine Micropaleontology, May 1999

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