Globotruncana

Daughter taxa (time control age-window is: 0-800Ma)
			Globotruncana aegyptiaca
			Globotruncana arca
			Globotruncana bulloides
			Globotruncana dalbiezi
			Globotruncana dupeublei
			Globotruncana esnehensis
			Globotruncana falsostuarti
			Globotruncana hilli
			Globotruncana lapparenti
			Globotruncana linneiana
			Globotruncana mariei
			Globotruncana neotricarinata
			Globotruncana orientalis
			Globotruncana rosetta
			Globotruncana rugosa
			Globotruncana ventricosa
			Globotruncana sp. Specimens which cannot be assigned to established species

Taxonomy

Original description: Test trochoid, the adult usually much compressed, the dorsal and ventral sides either flat or convex, ventral s ide sometimes slightly concave, the periphery truncate, usually with a double keel on the dorsal and ventral sides; aperntre on the ventral side; apparently pelagic in part.

Entries in the Catalog of original descriptions: Globotruncana, Rosalinella

Distinguishing features:
Parent taxon (Globotruncanidae): Test trochospiral, chambers angular, periphery truncate or carinate; primary aperture umbilical, covered by a spiral system of tegilla that is provided with accessory intralaminal and infralaminal apertures.
This taxon: Test high to low trochospiral, umbilicus occupying from one-fourth to one-half the diameter of the flat to concave umbilical side, peripheral margin truncate and bicarinate, keels separated by an imperforate carinal band, keel on the umbilical side less well developed and may be absent from the final few chambers, peripheral outline entire to lobulate; wall calcareous, finely perforate, surface generally smooth on the spiral side, may be pustulose on the umbilical side, particularly on the earlier chambers, sutures curved to straight, elevated on the spiral side and depressed, flush, or elevated on the umbilical side; primary aperture interiomarginal and umbilical, may be bordered by portici in the early stage, later or always with a system of tegilla that cover most of the umbilicus and have both proximal and distal accessory apertures.

Geological Range:
Last occurrence (top): at top of P. hariaensis zone (100% up, 66.4Ma, in Maastrichtian stage). Data source: Total of ranges of the species in this database
First occurrence (base): within D. asymetrica zone (83.65-85.60Ma, base in Santonian stage). Data source: Total of ranges of species in this database

Plot of range and occurrence data:

• Range-bar - range as quoted above, pink interval top occurs in, green interval base occurs in.
• Triangles indicate an event for which a precise placement has been suggested
• Neptune data: This is a higher taxon page so Neptune data is not plotted. See also: customisable plot Parent: Globotruncanidae

Globotruncana compiled by the pforams@mikrotax project team viewed: 10-12-2024 Taxon Search: Advanced Search Short stable page link: https://mikrotax.org/pforams/index.php?id=110152 Go to Archive.is to create a permanent copy of this page - citation notes

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Comments (1)

 

 

 

 

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ahmed taha

Posts: 1

Since: Oct 2019

ahmed taha(Haiti)

hi thanks for the information

15 October 2019 18:29

 

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