Globigerinoides
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. Morphology The foraminifera of genus ''Globigerinoides'' are all shallow-water species with spinose forms made of hyaline calcite. Most species have trochospiral chamber arrangement, though some species exhibit further complexity with streptospiral chamber arrangement. Tests are composed of thin perforated walls, with very large pores, and spines being added at the end of individual chamber formation ...
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