Globigerina bulloides
G. bulloides is found nearly everywhere (cosmopolitan species), but is more abundant in Temperate to Polar waters (Middle to High latitudes). It is also found in cool upwelling regions, such as off the Oregon coast. It is rare is Tropical waters.
G. bulloides is a spinose planktic foraminifera that has 4 chambers in the final whorl. This species typically has a large apertural and lacks an apertural lip (which helps to distinguish it from the related species, G. falconensis. There is a considerable amount of morphological variability in this species. Typical adult size >150 microns.
More information: https://www.foraminarium.com/g_bulloides.html https://www.marinespecies.org/aphia.php?p=taxdetails&id=113434 https://www.mikrotax.org/pforams/index.php?id=104034
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