Catalog entries: Globigerinoides diminuta
Type images:Distinguishing features:
Parent taxon (Globigerinoides): Supplementary apertures, with ruber/sacculifer-type spinose wall texture
This taxon: Like G. subquadratus, but very small, compact test. Apertures almost circular, symmetrically above sutures.
Aperture: Primary aperture interiomarginal umbilical small circular symmetrical arch. Supplementary sutural apertures on spiral side [Aze 2011, based on Kennett & Srinivasan 1983]
Diagnostic characters:
Morphology:
Wall type:
Character matrix
| test outline: | Subcircular | chamber arrangement: | Trochospiral | edge view: | Equally biconvex | aperture: | Umbilical |
| sp chamber shape: | Globular | coiling axis: | Low-moderate | periphery: | N/A | aperture border: | N/A |
| umb chbr shape: | Globular | umbilicus: | Wide | periph margin shape: | Broadly rounded | accessory apertures: | Sutural |
| spiral sutures: | Strongly depressed | umb depth: | Deep | wall texture: | Cancellate | shell porosity: | Macroperforate: >2.5µm |
| umbilical or test sutures: | Strongly depressed | final-whorl chambers: | 3-3 | N.B. These characters are used for advanced search. N/A - not applicable | |||
[SCOR WG138]
Geographic distribution
Isotope paleobiology
Phylogenetic relations
Possibly Gs. diminutus represents a tropical variant of Gs. subquadratus. [Kennett & Srinivasan 1983]
Most likely ancestor: Globigerinoides subquadratus - at confidence level 3 (out of 5). Data source: Kennett & Srinivasan 1983, fig. 10.
Geological Range:
Last occurrence (top): within N9 zone (14.24-15.10Ma, top in Langhian stage). Data source: Kennett & Srinivasan 1983
First occurrence (base): within N7 zone (16.38-17.54Ma, base in Burdigalian stage). Data source: Kennett & Srinivasan 1983
Plot of occurrence data:
Primary source for this page: Kennett & Srinivasan 1983, p.74
Aze, T., et al. (2011). A phylogeny of Cenozoic macroperforate planktonic foraminifera from fossil data. Biological Reviews. 86: 900-927. gs Bolli, H. M. (1957b). Planktonic foraminifera from the Oligocene-Miocene Cipero and Lengua formations of Trinidad, B.W.I. 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: 97-123. gs Keller, G. (1985). Depth stratification of planktonic foraminifers in the Miocene Ocean. In, Kennett, J. P. (ed.) The Miocene Ocean: Paleoceanography and Biogeography. GSA Memoir . 163: 1-337. gs Kennett, J. P. & Srinivasan, M. S. (1983). Neogene Planktonic Foraminifera. Hutchinson Ross Publishing Co., Stroudsburg, Pennsylvania. 1-265. gs Postuma, J. A. (1971). Manual of planktonic foraminifera. Elsevier for Shell Group, The Hague. 1-406. gsReferences:

![]()
![]() |
Globigerinoides diminutus compiled by the pforams@mikrotax project team viewed: 7-11-2025
Short stable page link: https://mikrotax.org/pforams/index.php?id=104060 Go to Archive.is to create a permanent copy of this page - citation notes |