Globoquadrina conglomerata


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

Taxonomy

Citation: Globoquadrina conglomerata (Schwager, 1866)
Rank: species
Basionym: Globigerina conglomerata Schwager, 1866
Synonyms:
Taxonomic discussion: This is a problematic taxon and accoridng 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 yet adopted this reccomendation (e.g. Brummer & Kucera 2015). [editor's comment - JRY 2018]

Catalog entries: Globigerina conglomerata, Globoquadrina pseudofoliata

Type images:

Distinguishing features: 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


Diagnostic characters: Test: Low trochospiral, equatorial periphery slightly lobate
Aperture: Interiomarginal umbilical low arch with umbilical teeth [Aze 2011, based on Banner & Blow 1960]
Coiling direction (in extant population): mixed

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:4.0-4.0 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]


Isotope paleobiology: Aze et al. 2011 ecogroup 3 - Open ocean thermocline. Based on light ∂13C and relatively heavy ∂18O Cited sources (Aze et al. 2011 appendix S3): this study

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

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

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

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

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: 18-10-2019

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