Globigerinidae

Globigerinidae is a family of planktonic foraminifera, which are single-celled organisms with shells called tests. These microorganisms are found in all oceans and are important index fossils in stratigraphy due to their rapid evolution and widespread distribution. Globigerinidae tests are typically spherical or subspherical and are composed of calcium carbonate. They are characterized by their multiple chambers, which are added as the organism grows. The chambers are usually inflated and globular, giving the family its name. Reproduction in Globigerinidae is thought to occur both sexually and asexually. When they die, their shells sink to the ocean floor and accumulate, forming calcareous ooze. Fossil records of Globigerinidae provide valuable information about past ocean conditions, including temperature and salinity, as well as the history of Earth's climate. Species within this family are diverse and have played a significant role in the evolution of marine life. Their ecological niche as primary producers in the planktonic food web is also noteworthy.