Globanomalina planocompressa

Classification: pf_cenozoic -> Globanomalinidae -> Globanomalina -> Globanomalina planocompressa
Sister taxa: G. australiformis, G. luxorensis, G. ovalis, G. imitata, G. planocompressa, G. planoconica, G. chapmani, G. pseudomenardii, G. ehrenbergi, G. compressa, G. archeocompressa, G. sp.,


Citation: Globanomalina planocompressa (Shutskaya 1965)
Rank: Species
Basionym: Globorotalia planocompressa
Taxonomic discussion: Although the original types are presumably lost, the meaning of this taxon seems clear from study of the Russian collections, and Blow's (1979) analysis of the species is followed herein. He based his analysis on the specimen figured by Loeblich and Tappan (1957a, pl. 40: fig. 5a-c), which became a paratype of this species when Shutskaya included this specimen in synonymy with her new species. Globanomalina planocompressa is the first member of the
planocompressa -imitata -ovalis lineage, a lineage characterized by inflated, perforate-walled chambers. [Olsson et al. 1999]

Catalog entries: Globorotalia planocompressa, Globorotalia planocompressa planocompressa

Type images:

Distinguishing features: 5 chambers in the final whorl, increasing moderately in size. The chambers are more inflated than in G. archeocompressa and globular to ovoid.

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.


Diagnostic characters: The five chambers in the ultimate whorl increase moderately in size. The chambers are more inflated than in G. archeocompressa and globular to ovoid in shape. The pores which average 1 um at the narrowest point are evenly distributed in the chamber walls although some areas, especially on parts of the periphery, are imperforate. The wall ranges from 4 to 7 um in thickness. [Olsson et al. 1999]

Character matrix

test outline:Circularchamber arrangement:Planispiraledge view:Inequally biconvexaperture:Umbilical-extraumbilical
sp chamber shape:Inflatedcoiling axis:N/Aperiphery:N/Aaperture border:Thin lip
umb chbr shape:Inflatedumbilicus:Narrowperiph margin shape:Broadly roundedaccessory apertures:None
spiral sutures:Strongly depressedumb depth:Deepwall texture:Smoothshell porosity:Finely Perforate: 1-2.5µm
umbilical or test sutures:Strongly depressedfinal-whorl chambers:5.0-5.0 N.B. These characters are used for advanced search. N/A - not applicable

Biogeography and Palaeobiology

Geographic distribution: Known distribution in the northern hemisphere middle and low latitudes. [Olsson et al. 1999]
Aze et al. 2011 summary: Northern hemisphere and middle to low latitudes; based on Olsson et al. (1999)

Isotope paleobiology: Globanomalina planocompressa has ∂18O and 5'3C similar to Parasubbotina pseudobulloides, S. triloculinoides, and E. eobulloides. The species has distinctly more positive ∂18O and more negative ∂13C than Praemurica and Woodringina. [Olsson et al. 1999]
Aze et al. 2011 ecogroup 3 - Open ocean thermocline. Based on light δ13C and relatively heavy δ18O. Sources cited by Aze et al. 2011 (appendix S3): Olsson et al. (1999)

Phylogenetic relations: This species originates in Zone Pa from G. archeocompressa by the inflation of chambers and the loss of an imperforate peripheral margin. It, in turn, gives rise to G. imitata in Zone Pic. [Olsson et al. 1999]

Most likely ancestor: Globanomalina archeocompressa - at confidence level 4 (out of 5). Data source: Olsson et al. 1999, fig 5a.
Likely descendants: Globanomalina imitata;

Biostratigraphic distribution

Geological Range:
Notes: Upper Zone Pa to Zone Pic. [Olsson et al. 1999]
Last occurrence (top): in mid part of P1c subzone (50% up, 63.3Ma, in Danian stage). Data source: Olsson et al. 1999, fig 5a
First occurrence (base): in mid part of Pa zone (50% up, 65.9Ma, in Danian stage). Data source: Olsson et al. 1999, fig 5a

Plot of occurrence data:

Primary source for this page: Olsson et al. 1999 - Atlas of Paleocene Planktonic Foraminifera, p. 44


Blow, W. H. (1979). The Cainozoic Globigerinida: A study of the morphology, taxonomy, evolutionary relationships and stratigraphical distribution of some Globigerinida (mainly Globigerinacea). E. J. Brill, Leiden. 2: 1-1413. gs :: ::

Loeblich, A. R. & Tappan, H. (1957). Planktonic foraminifera of Paleocene and early Eocene Age from the Gulf and Atlantic coastal plains. In, Loeblich, A. R. , Jr. , Tappan, H. , Beckmann, J. P. , Bolli, H. M. , Montanaro Gallitelli, E. & Troelsen, J. C. (eds) Studies in Foraminifera. U.S. National Museum Bulletin. 215: 173-198. gs :: ::

Olsson, R. K., Hemleben, C., Berggren, W. A. & Liu, C. (1992). Wall Texture Classification of planktonic foraminifera genera in the Lower Danian. Journal of Foraminiferal Research. 22(3): 195-213. gs :: ::

Olsson, R. K., Hemleben, C., Berggren, W. A. & Huber, B. T. (1999). Atlas of Paleocene Planktonic Foraminifera. Smithsonian Institution Press, Washington, DC. 1-252. gs :: ::

Shutskaya, E. K. (1965). Phylogenetic interrelationship of species of the Globorotalia compressa Plummer group in Danian time and the Paleocene Epoch. Voprosy Mikropaleontologii. 9: 180-. gs :: ::


Globanomalina planocompressa compiled by the pforams@mikrotax project team viewed: 14-7-2020

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