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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 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. Description 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 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Globigerinoidea
Globigerinoidea is a superfamily of free-living, calcareous, planktonic foraminiferal protists that have lived in the open ocean since the Eocene. It is part of the suborder Globigerinina.Globigerinoidea World Foraminifera Database, accessed 27 November 2018 test (biology), Tests are trochospiral but later chambers may be enveloping. walls are perforate with numerous small pores or fewer larger ones and the surface may be covered with narrow elongate monocrystalline spines. Apertures vary in position from interiomarginal to equatorial and may be relatively large. Secondary apertures along the sutures may also be found. Two families are included, the Globigerinidae and Hastigerinidae. The Globigerinacea, sensu Loeblich and Tappan, 1988, is essentially the Globigerinidae of Loeblich and Tappan, 1964, even th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cassigerinellidae
Cassigerinellidae is an extinct family of foraminifera belonging to the superfamily Guembelitrioidea and the suborder 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 .... Genera It includes the genera '' Cassigerinella'' and '' Riveroinella''. References External links * ForaminiferidaChapter 18: Taxonomy, Biostratigraph, and Phylogeny Of Oligocene Cassigerinella, Published: January 31, 2018 Foraminifera families Globigerinina {{Foraminifera-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Truncorotaloididae
Truncorotaloididae is a family of foraminifera belonging to the superfamily Globorotalioidea in the suborder Globigerinina and the order Rotaliida.Truncorotaloididae World Foraminifera Database, accessed 27 November 2018 It is found in marine sediments from the middle to the upper . Genera The family contains the following genera: * ''Acarinina
AcarininaSubbotina, N. N. (1953). Iskopae ...
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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 other uses; and commonly an external shell (called a "Test (biology), test") of diverse forms and materials. Tests of chitin (found in some simple genera, and Textularia in particular) are believed to be the most primitive type. Most foraminifera are marine, the majority of which live on or within the seafloor sediment (i.e., are benthos, benthic), while a smaller number float in the water column at various depths (i.e., are planktonic), which belong to the suborder Globigerinina. Fewer are known from freshwater or brackish conditions, and some very few (nonaquatic) soil species have been identified through molecular analysis of small subunit ribosomal DNA. Foraminifera typically produce a test (biology), test, or shell, which can have eithe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Globorotalioidea
The Globoroatioidea (Globorotaliacea in older classifications) constitutes a superfamily of Cenozoic plantonic foraminifera. It is part of the suborder Globigerinina.Globorotalioidea World Foraminifera Database, accessed 27 November 2018 Globoroatioidea have trochospiral tests with rounded to carinate peripheries, the walls of which are of finely lamellar, perforate, of optically radial , with an inner organic lining. The surface of these tests is smooth, lacking spines, but may be covered with pustules or pitted, and may have one or more large pores at the center. There is a single primary aperture that may be bordered by an imperforate lip, as well as possible supplementary apertures. Fam ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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 Jurassic constitutes the middle period of the Mesozoic, Mesozoic Era and is named after the Jura Mountains, where limestone strata from the period were first identified. The start of the Jurassic was marked by the major Triassic–Jurassic extinction event, associated with the eruption of the Central Atlantic magmatic province, Central Atlantic Magmatic Province. The beginning of the Toarcian Stage started around 183 million years ago and is marked by an extinction event associated with widespread Anoxic event, oceanic anoxia, ocean acidification, and elevated temperatures likely caused by the eruption of the Karoo-Ferrar, Karoo-Ferrar large igneous provinces. The end of the Jurassic, however, has no clear boundary with the Cretaceous and i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Globigerina
''Globigerina'' () is a genus of planktonic Foraminifera, in the order of Rotaliida.Globigerina World Foraminifera Database, accessed 3 December 2018 It has populated the world's oceans since the Middle . ''Globigerina'' ooze Vast areas of the ocean floor are covered with ''Globigerina'' ooze, dominated by the foraminiferous shells of ''Globigerina'' and other |
Hantkeninoidea
Hantkeninoidea (Hantkeninacea in older classifications) is a superfamily of foraminifera with planispiral or enrolled biserial tests, found in marine sediments of Paleocene to Miocene age, in which chambers vary from globular to elongate and the primary aperture is equatorial in position. It contains one family, the Hantkeninidae.Hantkeninoidea World Foraminifera Database, accessed 27 November 2018 Members of the Hantkeninacea were included in the family Hantkeninidae, established by Cushman, 1927, as defined in the Treatise
A treatise is a formal and systematic written discourse on some subject, generally longe ...
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Heterohelicoidea
Heterohelicoidea is a superfamily of middle Jurassic to Oligocene planktonic forams characterized by biserial or triserial tests, at least in the early stage, that may be reduced in the later stage but more commonly show chamber proliferation in the later stage. Aperture a low or high arch at the base of the final chamber or terminal in uniserial stage. Heterohelicoidea contains one family, the Heterohelicidae Heterohelicidae is a family of 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 ....Heterohelicoidea World Foraminifera Database, accessed 27 November 2018 References * Loeblich, A.R. Jr and H. Tappan 1988. Foram ...[...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
