Globigerina
Globigerina Temporal range: Middle Jurassic - Recent.
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Illustration of Globigerina ooze | |
Scientific classification | |
Domain: | Eukaryota |
Clade: | Diaphoretickes |
Clade: | SAR |
Phylum: | Retaria |
Subphylum: | Foraminifera |
Class: | Globothalamea |
Order: | Globigerinida
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Superfamily: | Globigerinoidea |
Family: | Globigerinidae |
Subfamily: | Globigerininae |
Genus: | Globigerina d'Orbigny, 1826 |
Globigerina (/ɡloʊˌbɪdʒəˈraɪnə/) is a genus of planktonic Foraminifera, in the order of Rotaliida.[1] It has populated the world's oceans since the Middle Jurassic.
Globigerina ooze
Vast areas of the ocean floor are covered with Globigerina
Description
Globigerina is a marine microorganism characterized by its spherical, coiled shell known as a test. The test is composed of chambers that are not elongated radially but are rounded and trochospiral. As the organism grows, these chambers enlarge rapidly, typically reaching three to five chambers in the final whorl.
The test of Globigerina is constructed from
The aperture, or opening, of the test is located at the top and takes the form of a high umbilical arch. This aperture may be accompanied by an imperforate rim or a narrow lip around its edges. Notably, there are no secondary apertures present in the test structure.
Species
Globigerina includes the following species (extinct species marked with a dagger, †)
- Globigerina bulloides d'Orbigny, 1826
- Globigerina compacta Hofker, 1956 †
- Globigerina cretacea d'Orbigny, 1840 † (later reclassified as Muricohedbergella delrioensis)
- Globigerina dubia Egger, 1857 †
- Globigerina falconensis Blow, 1959
- Globigerina hexagona Natland, 1938
- Globigerina paratriloculinoides Hofker, 1956 †
- Globigerina paravenezuelana Hofker, 1956 †
- Globigerina protoreticulata Hofker, 1956 †
- Globigerina pseudocretacea Hofker, 1956 †
- Globigerina stainforthi Hofker, 1956 †
- Globigerina supracretacea Hofker, 1956 †
References
- ^ Globigerina, World Foraminifera Database, accessed 3 December 2018
- ^ John Murray and A. F. Renard (1891). Report of the Scientific Results of the Voyage of H.M.S. Challenger During the Years 1873–76 — Report on the Deep-Sea Deposits based on the Specimens Collected during the Voyage. London: His Majesty's Stationery Office. p. 213. Retrieved April 5, 2013.
- 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.
- Alfred R. Loeblich Jr. and Helen Tappan, 1988. Forminiferal Genera and their Classification. [1]. GSI E-book