Citation: Globigerinoidesrublobatus Latas et al. 2023Taxonomic rank: speciesBasionym: Globigerinoides rublobatus Latas et al. 2023Synonyms:
? Globigerinoides gomitulus (Seguenza) – Kaneps, 1973, p. 734 (no figures).
? Globigerinoides gomitulus (Seguenza) – (plesiotype) – Saito et al. 1981 p. 57, pl. 14, fig. 2a– d.
Globigerinoides gomitulus (Seguenza) pink-coloured variety – Beiersdorf et al. 1995, p. 48, pl. 3, figs. 4–6.
Globigerinoides sp. cf. conglobatus (pink) – Rosenthal et al. 2018b, p. 18, fig. 17.
Not Globigerinoides gomitulus Seguenza, 1880, pl. XVII, fig. 16 (Pliocene section in Riace, Calabria region, southern Italy) (inadequate illustration; no type specimen designated; neotype designated by Mistretta 1962, p. 202, fig. 1 (Globigerinoides elongatus) subsequently lost from the micropalaeontological collection of the Institute of Geology and Paleontology at the University of Palermo). [synonymy from Latas et al. 2023]
Taxonomic discussion: This species combines characteristics typical of Globigerinoides conglobatus and Globigerinoides ruber, with which it co-occurs, but is distinct from both. Morphometric data indicate that G. rublobatus is closer to G. conglobatus, potentially signalling an evolutionary affinity. It occurs as two variants, a pigmented (pink) form and a non-pigmented (white) form. The non-pigmented forms are on average ∼ 50 % larger than the pigmented forms. [Latas et al. 2023]
Distinguishing features: Parent taxon (Globigerinoides): Supplementary apertures, with ruber/sacculifer-type spinose wall texture This taxon: Like G. conglobatus but 3 chambers in final whorl, smaller forms show pink pigmentation, aperture located above the final suture
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: Large test with distinctly flattened ultimate and penultimate chambers. Primary aperture elongated, low-arched and positioned over the single suture, which separates the penultimate and antepenultimate chamber. The morphospecies occurs in two pigmentation variants (chromotypes) represented by pink- and white-coloured forms. Size: pink form 400-700 µm;, white form 500-800 µm (both consistently larger than G. ruber which is typically 300-400 µm)
Character matrix
test outline:
Lobate
chamber arrangement:
Trochospiral
edge view:
Equally biconvex
aperture:
Umbilical
sp chamber shape:
Globular
coiling axis:
Low-moderate
periphery:
N/A
aperture border:
Thin lip
umb chbr shape:
Globular
umbilicus:
Narrow
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
Biogeography and Palaeobiology
Most likely ancestor: Globigerinoides conglobatus - at confidence level 2 (out of 5). Data source: Latas et al. 2023, p75.
Biostratigraphic distribution
Geological Range: Last occurrence (top): within Pt1a subzone (0.61-1.88Ma, top in Ionian stage). Data source: Latas et al. 2023 First occurrence (base): within Pt1a subzone (0.61-1.88Ma, base in Gelasian stage). Data source: Latas et al. 2023
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).
(NB There is no histogram as there are no occurrence records for the taxon in the Neptune database) Parent: Globigerinoides
Primary source for this page: Latas et al. 2023
References:
Beiersdorf, H., et al. (1995). High-resolution stratigraphy and the response of biota to Late Cenozoic environmental changes in the central equatorial Pacific Ocean (Manihiki Plateau). Marine Geology. 125: 29-59. gs
Latas, M., Pearson, P. N., Poole, C. R., Fabbrini, A. & Wade, B. S (2023). Globigerinoides rublobatus – a new species of Pleistocene planktonic foraminifera . Journal of Micropalaeontology. 42: 57-81. gsO
Rosenthal, Y., et al. (2018). Site U1482. Proceedings of the Integrated Ocean Drilling Program. 363: 1-62. gs
Saito, T., Thompson, P. R. & Breger, D. (1981). Systematic Index of Recent and Pleistocene Planktonic Foraminifera. University of Tokyo Press, Tokyo. 1-190. gs
Seguenza, G. (1880). Le foramazioni terziarie nella provincia di Reggio (Calabria),. Rendiconti Atti della Reale Accadamia dei Lincei. (6): 1-466. gsO
Globigerinoides rublobatus compiled by the pforams@mikrotax project teamviewed: 12-8-2026
Latas et al 2023 f04 01-2.JPG
Latas et al 2023 f04 03-4.JPG
Latas et al 2023 f04 05-6.JPG
Latas et al 2023 f04 07-8.JPG
Latas et al 2023 f04 09-10.JPG
Latas et al 2023 f04 11-12.JPG
Latas et al 2023 f04 13-14.JPG
Latas et al 2023 f04 15.JPG
Latas et al 2023 f05 01-2.JPG
Latas et al 2023 f05 03-4.JPG
Latas et al 2023 f05 05-6.JPG
Latas et al 2023 f05 07-8.JPG
Latas et al 2023 f05 09-10.JPG
Latas et al 2023 f05 11-12.JPG
Latas et al 2023 f05 13-14.JPG
Latas et al 2023 f05 15.JPG
Latas et al f01.jpg
