Ciperoella


Classification: pf_cenozoic -> Globigerinidae -> Ciperoella
Sister taxa: Beella, Globigerina, Globigerinella, Protentella, Quiltyella, Ciperoella, Globigerinoides, Globigerinoidesella, Globoturborotalita, Orbulina, Praeorbulina, Sphaeroidinella, Sphaeroidinellopsis, Trilobatus, Turborotalita, Dentoglobigerina, Globoquadrina, Catapsydrax, Clavatorella, Paragloborotalia, Protentelloides, Eoglobigerina, Globigerinatheka, Globorotaloides, Guembelitrioides, Orbulinoides, Parasubbotina, Pseudoglobigerinella, Subbotina,
Daughter taxa: (blue => in age window 0-300Ma)
Like C. ciperoensis but less lobulate peripheral outline, more compact form and a greater rate of chamber size increase
Like C. ciperoensis but smaller,; chambers squared off / wedge-shaped; sutures distinctly depressed; large umbilical aperture.
Test low trochospiral, globular, lobulate, umbilicus open; 5 chambers in final whorl; aperture umbilical;
Like C. ciperoensis but with larger, more globular, test, larger umbilicus and higher trochospire. 

Taxonomy

Citation:

Genus Ciperoella Olsson and Hemleben n. gen.

Rank: genus
Type species: Globigerina ciperoensis Bolli, 1954.
Taxonomic discussion: Ciperoella is a common form in the Oligocene that has been regarded by workers as a species of Globigerina. However, it does not have the wall texture of Globigerina. Hence, the naming of a new genus.  [Olsson et al. 2018]

Catalog entries: Ciperoella;

Type images:

Distinguishing features: Like Globoturborotalita, but with distinctive reticulate wall, and 4½-5 chambers in final whorl

NB These concise distinguishing features statements are used in the tables of daughter-taxa to act as quick summaries of the differences between e.g. species of one genus.
They are being edited as the site is developed and comments on them are especially welcome.

Description


Diagnostic characters: Ciperoella n. gen. has an underlying ruber/sacculifer wall with elongate parallel ridges and short incomplete cross ridges, a wall texture like that in the nonspinose Neogloboquadrina. Porosity ranges from about 25-60 pores per 50 μm2 area. Several species are typically small in size (<200 μm). When well-preserved they can appear ‘shiny’ and translucent under the light microscope, possibly owing to crystal orientation of the thin wall. It differs from Globoturborotalita, to which a number of species discussed here have been previously assigned, by the distinctive reticulate nature of the wall and on average ½ to 1 more chamber in the final whorl. [Olsson et al. 2018]

Wall type: Normal perforate, spinose, Neogloboquadrina-type wall texture with underlying ruber/sacculifer or sacculifer wall with elongate parallel ridges. Pore concentrations range from around 25-60 pores/50 μm2 test surface area and pore diameters from around 0.9-2.5 μm [Olsson et al. 2018]

Test morphology: Test low trochospiral, lobulate in outline, chambers globular to ovoid. In the final whorl, 4½-5 chambers; aperture umbilical bordered by a thin rim. [Olsson et al. 2018]

Biogeography and Palaeobiology

Most likely ancestor: Globoturborotalita - at confidence level 3 (out of 5). Data source: Olsson et al. 2018 f7.1.

Biostratigraphic distribution

Geological Range:
Notes: Upper Eocene to lower Miocene. [Olsson et al. 2018]
Last occurrence (top): in lower part of Langhian Stage (40% up, 15.1Ma, in Langhian stage). Data source: Total of range of species in this database
First occurrence (base): in upper part of Priabonian Stage (76% up, 34.8Ma, in Priabonian stage). Data source: Total of range of species in this database

Plot of occurrence data:

Primary source for this page: Olsson et al. 2018 - Olig Atlas chap.7 p.217

References:

Bolli, H.M., (1954). Note on Globigerina concinna Reuss 1850. Contributions from the Cushman Foundation for Foraminiferal Research, 5(1): 1-3.

Olsson, R.K.; Hemleben, C.; Coxall, H.K. & Wade, B.S., (2018). Taxonomy, biostratigraphy, and phylogeny of Oligocene Ciperoella. In: Wade, B.S. et al. (Editors), Atlas of Oligocene Planktonic Foraminifera. Cushman Foundation for Foraminiferal Research Special Pulbication. 46, pp. 215-231.


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Ciperoella compiled by the pforams@mikrotax project team viewed: 12-11-2018

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Short stable page link: http://mikrotax.org/pforams/index.php?id=104322Go to Archive.is to create a permanent copy of this page - citation notes



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