Daughter taxa (time control age-window is: 0-800Ma)
Ciperoella anguliofficinalis Like C. ciperoensis but less lobulate peripheral outline, more compact form and a greater rate of chamber size increase
Ciperoella angulisuturalis Like C. ciperoensis but smaller; chambers squared off / wedge-shaped; sutures distinctly depressed; large umbilical aperture.
Ciperoella ciperoensis Test low trochospiral, globular, lobulate, umbilicus open; 5 chambers in final whorl; aperture umbilical;
Ciperoella fariasi Like C. ciperoensis but with larger, more globular, test, larger umbilicus and higher trochospire.
Citation: Ciperoella Olsson & Hemleben, in Olsson et al. 2018Taxonomic rank: genusType 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]
Distinguishing features: Parent taxon (Globigerinidae): Wall spinose, usually with 3½-6 globular chambers in final whorl, trochospiral or planispiral This taxon: 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 (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] 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] 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]
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): at top of M5 zone (100% up, 15.1Ma, in Langhian stage). Data source: Total of ranges of the species in this database First occurrence (base): within E15 zone (34.68-35.89Ma, base in Priabonian stage). Data source: Total of ranges of species in this database
Plot of 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.
Grey shading between taxa indicates intergrading species within an anagenetic lineage (data from
Lamyman et al. 2026).
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. gs
Olsson, R. K., Hemleben, C., Coxall, H. K. & Wade, B. S. (2018). Taxonomy, biostratigraphy, and phylogeny of Oligocene Ciperoella. In, Wade, B. S., Olsson, R. K., Pearson, P. N., Huber, B. T. & Berggren, W. A. (eds) Atlas of Oligocene Planktonic Foraminifera. Cushman Foundation for Foraminiferal Research, Special Publication . 46(Chap 7): 215-230. gs
Ciperoella compiled by the pforams@mikrotax project teamviewed: 5-9-2026
