The Globigerinina is a suborder of foraminiferans that are found as marine plankton. They produce hyaline calcareous tests, and are known as fossils from the Jurassic period onwards. The group has included more than 100 genera and over 400 species, of which about 30 species are extant. One of the most important genera is Globigerina; vast areas of the ocean floor are covered with Globigerina ooze (named by Murray and Renard in 1873), dominated by the shells of planktonic forms.
Globigerinids are characterized by distinctly perforate planispiral or trochospiral tests composed of lamellar radial hyaline (glassy) calcite, with typically globular chambers and single interiomarginal aperture. Some however have multiple or auxiliary apertures, and in some the aperture is areal or terminal in location. Some, also, have keels, reinforcing thickenings along exterior angles. An adaptation to the planktonic habit is the development of long narrow spines that support a frothy buoyant ectoplasm.
The Globigerinina are now divided into these superfamilies and families:[1]
The Globigerinina is a suborder of foraminiferans that are found as marine plankton. They produce hyaline calcareous tests, and are known as fossils from the Jurassic period onwards. The group has included more than 100 genera and over 400 species, of which about 30 species are extant. One of the most important genera is Globigerina; vast areas of the ocean floor are covered with Globigerina ooze (named by Murray and Renard in 1873), dominated by the shells of planktonic forms.
Globigerinina es el único suborden de foraminífero planctónico del orden Globigerinida,[1] que pertenece a la clase Foraminiferea Eichwald, 1830, o Foraminifera.[2]
Clasificaciones posteriores han dividido Gobligerinina en dos subórdenes: suborden Globigerinina s.s. y suborden Heterohelicina, el cual incluye la superfamilia Heterohelicoidea y ha sido incluido en el orden Heterohelicida.[3]
Gobligerinina incluye a las siguientes superfamilias:
También han sido consideradas las siguientes superfamilias:[3]
Globigerinina es el único suborden de foraminífero planctónico del orden Globigerinida, que pertenece a la clase Foraminiferea Eichwald, 1830, o Foraminifera.
