pforams@mikrotax - Globoquadrina conglomerata pforams@mikrotax - Globoquadrina conglomerata

Globoquadrina conglomerata


Classification: pf_cenozoic -> Globigerinidae -> Globoquadrina -> Globoquadrina conglomerata
Sister taxa: G. conglomerata, G. dehiscens, G. sp.

Taxonomy

Citation: Globoquadrina conglomerata (Schwager, 1866)
taxonomic rank: species
Basionym: Globigerina conglomerata Schwager, 1866
Synonyms:
Taxonomic discussion: This is a problematic taxon and according to Wade et al. (2018) it should be reclassified into Dentoglobigerina. This is not followed here directly since the working group on extant planktonic foraminifera have not adopted this reccomendation (Brummer & Kucera 2015, 2022). As discussed in Brummer & Kucera (2022) G. conglomerata is non-spinose and falls outside the spinose clade in molecular genetic trees, which makes placement within the spinose genus Dentoglobigerina problematic. 

Catalog entries: Globigerina conglomerata, Globoquadrina pseudofoliata

Type images:

Distinguishing features:
Parent taxon (Globoquadrina): Trochospiral with quadrate to subquadrate profile; aperture in interiomarginal / umbilical-extraumbilical, one or more tooth-like projections extending into the umbilicus.
This taxon: Low trochospiral test, equatorial periphery slightly lobate; aperture interiomarginal umbilical low arch with umbilical teeth

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


Wall type:
Non-spinose; Cancellate [Aze 2011]

Size:
>250µm

Character matrix
test outline:Subquadratechamber arrangement:Trochospiraledge view:Equally biconvexaperture:Umbilical
sp chamber shape:Subrectangularcoiling axis:Low-moderateperiphery:N/Aaperture border:Teeth
umb chbr shape:Subtriangularumbilicus:Narrowperiph margin shape:Broadly roundedaccessory apertures:None
spiral sutures:Weakly depressedumb depth:Deepwall texture:Cancellateshell porosity:Finely Perforate: 1-2.5µm
umbilical or test sutures:Weakly depressedfinal-whorl chambers:4-4 N.B. These characters are used for advanced search. N/A - not applicable

Biogeography and Palaeobiology


Geographic distribution

Low latitudes [Aze et al. 2011, based on B_ (1968)]

In modern oceans a rare, warm water, species [SCOR WG138]

Map of distribution from ForCenS database

Isotope paleobiology
Aze et al. 2011 ecogroup 3 - Open ocean thermocline; based on comparison with other species of the genus.

Phylogenetic relations
Molecular Genotypes recognised (data from PFR2 database, June 2017): One genotype only from 33 sequences. References: André et al. 2014).

Biostratigraphic distribution

Geological Range:
Last occurrence (top): Extant. Data source: present in the plankton (SCOR WG138)
First occurrence (base): within PL2 zone (3.85-4.37Ma, base in Zanclean stage). Data source: Aze et al. 2011

Plot of occurrence data:

References:

Aze, T. et al. (2011). A phylogeny of Cenozoic macroperforate planktonic foraminifera from fossil data. Biological Reviews. 86: 900-927. gs

Banner, F. T. & Blow, W. H. (1960a). Some primary types of species belonging to the superfamily Globigerinaceae. Contributions from the Cushman Foundation for Foraminiferal Research. 11: 1-41. gs O

Brummer, G. J. A. & Kucera, M. (2015). Taxonomy of extant planktonic foraminifera, SCOR/IGBP WG138; August 2015. In, Spero, H. & Kucera, M. (eds) SCOR/IGBP Working Group 138: Planktonic Foraminifera and Ocean Changes. Final Workshop & Short Course on Culturing Planktonic Foraminifera. California 8-9. gs

Brummer, G-J. A. & Kucera, M. (2022). Taxonomic review of living planktonic foraminifera. Journal of Micropalaeontology. 41: 29-74. gs

Chaisson, W. P. & Leckie, R. M. (1993). High-resolution Neogene planktonic foraminifer biostratigraphy of Site 806, Ontong Java Plateau (Western Equatorial Pacific). Proceedings of the Ocean Drilling Program, Scientific Results. 130: 137-178. gs

Lam, A. & Leckie, R. M. (2020a). Late Neogene and Quaternary diversity and taxonomy of subtropical to temperate planktic foraminifera across the Kuroshio Current Extension, northwest Pacific Ocean. Micropaleontology. 66(3): 177-268. gs

Parker, F. L. (1967). Late Tertiary biostratigraphy (planktonic foraminifera) of tropical Indo-Pacific deep-sea cores. Bulletins of American Paleontology. 52(235): 115203-. gs

Schwager, C. (1866). Fossile Foraminiferen von Kar Nikobar, Reise der Oesterreichischen Fregatte Novara um Erde in den Jahren 1857, 1858, 1859 unten den Befehlen des Commodore B. Von Wuellerstorf-Urbair. Geologischer Theil, Geologische Beobachtung no. 2, Palaeontologische Mittheilung. 2: 187-268. gs O

Siccha, M. & Kucera, M. (2017). ForCenS, a curated database of planktonic foraminifera census counts in marine surface sediment samples. Scientific Data. 4(1): 1-12. gs

Wade, B. S., Pearson, P. N., Olsson, R. K., Fraass, A. J., Leckie, R. M. & Hemleben, C. (2018c). Taxonomy, biostratigraphy, and phylogeny of Oligocene and Lower Miocene Dentoglobigerina and Globoquadrina. 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 11): 331-384. gs


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Globoquadrina conglomerata compiled by the pforams@mikrotax project team viewed: 1-3-2024

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