Paragloborotalia

NB TAXA WHICH ORIGINATE IN THE OLIGOCENE ARE NOT INCLUDED YET
Classification: pf_neogene -> Globigerinidae -> Paragloborotalia
Sister taxa: Beella, Globigerina, Globigerinella, Protentella, Globigerinoides, Globigerinoidesella, Globoturborotalita, Orbulina, Praeorbulina, Sphaeroidinella, Sphaeroidinellopsis, Trilobatus, Turborotalita, Catapsydrax, Clavatorella, Paragloborotalia, Orcadia,

Distinguishing features: Low trochospiral, globular to subglobular chambers, umbilical-extraumbilical aperture with rim

Daughter taxa: (blue => in age window 0-300Ma)



Specimens which cannot be assigned to established species

Taxonomy

Citation: Paragloborotalia Cifelli 1982
Rank: genus
Type species: Globorotalia opima subsp. opima
Synonyms:

Catalog entries: Jenkinsella; Paragloborotalia;

Type images:

Distinguishing features: Low trochospiral, globular to subglobular chambers, umbilical-extraumbilical aperture with rim

NB The short diagnoses are used in the tables of daughter-taxa to act as quick summaries of the differences between e.g. species of one genus. They have initially been copied from the diagnostic characters/distinguishing features sections of the Eocene and Paleocene Atlases, they will be edited as the site is developed.

Description


Diagnostic characters: Rounded periphery lacking a distinct carina, globular to subglobular chambers arranged in a compact, low trochospire, and an umbilical-extraumbilical aperture bordered by a rim. The surface ultrastructure of Paragloborotalia is marked by a dense network of pores surrounded by thickened walls producing a cancellate surface pattern. [Kennett & Srinivasan, p. 171, discussing their genus Jenkinsella]

Biogeography and Palaeobiology

Biostratigraphic distribution

Geological Range:
Last occurrence (top): in lower part of Serravallian Stage (19% up, 13.4Ma, in Serravallian stage). Data source: Total of range of species in this database
First occurrence (base): near top of Chattian Stage (91% up, 23.5Ma, in Chattian stage). Data source: Total of range of species in this database

Plot of occurrence data:

References:

Cifelli, R., (1982). Early Occurrences and some Phylogenetic Implications of Spiny, Honeycomb Textured Planktonic Foraminifera. Journal of Foraminiferal Research, 12(2): 105-115.


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Paragloborotalia compiled by the pforams@mikrotax project team viewed: 16-8-2018

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