''Globigerina'' () is a genus of
plankton
Plankton are the diverse collection of organisms found in Hydrosphere, water (or atmosphere, air) that are unable to propel themselves against a Ocean current, current (or wind). The individual organisms constituting plankton are called plankt ...
ic
Foraminifera
Foraminifera (; Latin for "hole bearers"; informally called "forams") are single-celled organisms, members of a phylum or class of amoeboid protists characterized by streaming granular Ectoplasm (cell biology), ectoplasm for catching food and ot ...
, in the order of
Rotaliida
The Rotaliida are an order of Foraminifera, characterized by multilocular tests (shells) composed of bilamellar perforate hyaline lamellar calcite that may be optically radial or granular.
In form, rotaliid tests are typically enrolled, but ma ...
.
[Globigerina](_blank)
World Foraminifera Database, accessed 3 December 2018 It has populated the world's oceans since the Middle
Jurassic
The Jurassic ( ) is a Geological period, geologic period and System (stratigraphy), stratigraphic system that spanned from the end of the Triassic Period million years ago (Mya) to the beginning of the Cretaceous Period, approximately Mya. The J ...
.
''Globigerina'' ooze
Vast areas of the ocean floor are covered with ''Globigerina''
ooze, dominated by the
foraminiferous
Foraminifera (; Latin for "hole bearers"; informally called "forams") are single-celled organisms, members of a phylum or class (biology), class of Amoeba, amoeboid protists characterized by streaming granular Ectoplasm (cell biology), ectoplasm ...
shells of ''Globigerina'' and other
Globigerinina
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 spec ...
. The name was originally applied to mud collected from the bottom of the Atlantic Ocean when planning the location of the first transatlantic telegraph cables and it was mainly composed of the shells of ''
Globigerina bulloides
''Globigerina bulloides'' is a species of heterotrophic planktonic foraminifer with a wide distribution in the photic zone of the world's oceans. It is able to tolerate a range of sea surface temperatures, salinities and water densities, and is ...
''.
Description
''Globigerina'' has a globose, trochospirally enrolled test composed of spherical to ovate but not radially elongate chambers that enlarge rapidly as added, commonly with only three to five in the final whorl. The test (or shell) wall is calcareous, perforate, with cylindrical pores. During life the surface has numerous long slender spines that are broken on dead or fossil shells, the short blunt remnants resulting in a hispid surface. The aperture a high umbilical arch that may be bordered by an imperforate rim or narrow lip. No secondary apertures.
Species
''Globigerina'' includes the following species (extinct species marked with a dagger, †)
*''
Globigerina bulloides
''Globigerina bulloides'' is a species of heterotrophic planktonic foraminifer with a wide distribution in the photic zone of the world's oceans. It is able to tolerate a range of sea surface temperatures, salinities and water densities, and is ...
''
d'Orbigny, 1826
*''
Globigerina compacta
''Globigerina'' () is a genus of planktonic Foraminifera, in the order of Rotaliida.[Glo ...](_blank)
''
Hofker, 1956 †
*''
Globigerina cretacea''
d'Orbigny, 1840 † (later reclassified as ''
Muricohedbergella delrioensis'')
*''
Globigerina dubia
''Globigerina'' () is a genus of planktonic Foraminifera, in the order of Rotaliida.[Glo ...](_blank)
''
Egger, 1857 †
*''
Globigerina falconensis
''Globigerina'' () is a genus of planktonic Foraminifera, in the order of Rotaliida.[Glo ...](_blank)
''
Blow, 1959
*''
Globigerina hexagona
''Globigerina'' () is a genus of planktonic Foraminifera, in the order of Rotaliida.[Glo ...](_blank)
''
Natland, 1938
*''
''
Hofker, 1956 †
*''
''
Hofker, 1956 †
*''
''
Hofker, 1956 †
*''
''
Hofker, 1956 †
*''
Globigerina stainforthi
''Globigerina'' () is a genus of planktonic Foraminifera, in the order of Rotaliida.[Glo ...](_blank)
''
Hofker, 1956 †
*''
''
Hofker, 1956 †
References
*
Alfred R. Loeblich Jr. and
Helen Tappan
Helen may refer to:
People
* Helen of Troy, in Greek mythology, the most beautiful woman in the world
* Helen (actress) (born 1938), Indian actress
* Helen (given name), a given name (including a list of people with the name)
Places
* Helen, G ...
, 1964. Sarcodina Chiefly "Thecamoebians" and Foraminiferida; Treatise on Invertebrate Paleontology, Part C Protista 2. Geological Society of America and University of Kansas Press.
*
Alfred R. Loeblich Jr. and
Helen Tappan
Helen may refer to:
People
* Helen of Troy, in Greek mythology, the most beautiful woman in the world
* Helen (actress) (born 1938), Indian actress
* Helen (given name), a given name (including a list of people with the name)
Places
* Helen, G ...
, 1988. Forminiferal Genera and their Classification
GSI E-book
{{Taxonbar, from=Q5571051
Rotaliida genera
Fossil taxa described in 1826
Extant Jurassic first appearances