Globulina (foram)
Globulina is a genus of Foraminifera with an ovate to globular test, included in the Polymorphinidae, Notocariacea, that has been extant since the Middle Jurassic (Callovian).
| Globulina | |
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| Family: | Polymorphinidae |
| Genus: | Globulina d'Orbigny, 1839 |
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Guttulina (Globulina) d'Orbigny | |
The test, (or shell), is of translucent, perforate, optically radial calcite. The surface smooth or rarely spinose to striate. Chambers are added at first in five planes, a little more than 144 deg. apart, as with the miliolid Quinqueloculina, but spiraling around the long axis; later chambers reduced to only three planes. Chambers are strongly overlapping; sutures oblique, flush to slightly depressed. Aperture terminal.
References
- A. R. Loeblich and H. Tappan, 1964. Sarcodina Chiefly "Thecamoebians" and Foraminiferida; Treatise on Invertebrate Paleontology, Part C Protista 2. Geological Society of America and University of Kansas Press.
- A.R. Loeblich & H. Tappan,1988. Forminiferal Genera and their Classification. (E-book)
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