An order of calcareous planktic Foraminifera. One of the primary genera in the order is globigerina. The general range of the order is thought to range from the late Jurassic to the Holocene and has included more than 40 genera and over 400 species. About 30 species currently still exist. Globigerina ooze (first use of this name by Murray and Renard in 1873), composed primarily of planktic foraminifera, covers vast areas of the ocean floor.
According to a generally accepted idea, the planktonic Globigerinida evolved from a single benthic lineage in the Mid-Jurasic (Caron and Homewood, 1983) and radiated from surviving species after every major extinction event (Tappan and Loeblich, 1988).
A single representant of Candeinidae (G. glutinata) is unambiguously placed within the benthic Rotaliida, far from the rest of the planktonic species, suggesting that the microperforate foraminifera have diverged independently from some benthic lineages.
The lowest G+C content was observed in the Miliolida (29-32%) and Astrorhizida (30-31%), while in the Globigerinida, it averages 45%.
The Cainozoic Globigerinida : a study of the morphology, taxonomy, evolutionary relationships, and the stratigraphical distribution of some Globigerinida (mainly Globigerinacae)
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