pforams@mikrotax - Globorotalia crassaconica pforams@mikrotax - Globorotalia crassaconica

Globorotalia crassaconica


Classification: pf_cenozoic -> Globorotaliidae -> Globorotalia -> truncatulinoides lineage -> Globorotalia crassaconica
Sister taxa: G. cavernula, G. truncatulinoides, G. tosaensis, G. tenuitheca ⟩⟨ G. hessi, G. ronda, G. crassaformis, G. viola ⟩⟨ G. crassaconica, G. crassula

Taxonomy

Citation: Globorotalia crassaconica Hornibrook, 1981
taxonomic rank: species
Basionym: Globorotalia crassaconica

Catalog entries: Globorotalia crassaconica

Type images:

Distinguishing features:
Parent taxon (truncatulinoides lineage): G. crasula - crassaformis - tosaensis - truncatulinoides lineage, predominantly conicotruncate
This taxon: Like G. crassaformis but with broader, steep axial peripheral outline

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; Smooth [Aze 2011]

Character matrix
test outline:Quadratechamber arrangement:Trochospiraledge view:Planoconvexaperture:Umbilical-extraumbilical
sp chamber shape:Subrectangularcoiling axis:Lowperiphery:N/Aaperture border:Thin lip
umb chbr shape:Subtriangularumbilicus:Narrowperiph margin shape:Subangularaccessory apertures:None
spiral sutures:Flushumb depth:Shallowwall texture:Smoothshell porosity:Macroperforate: >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 to middle latitudes [Aze et al. 2011, based on This study]

[SCOR WG138]


Isotope paleobiology
Aze et al. 2011 ecogroup 4 - Open ocean sub-thermocline. Based on comparison with other species of the genus

Most likely ancestor: Globorotalia crassaformis - at confidence level 2 (out of 5). Data source: Stewart 2003 fig. 6.10; Aze et al. 2011, appendix 5.

Biostratigraphic distribution

Geological Range:
Last occurrence (top): within PL3 [Atl.] zone (3.16-3.85Ma, top in Piacenzian stage). Data source: Aze et al. 2011
First occurrence (base): within PL2 zone (3.85-4.37Ma, base in Zanclean stage). Data source: Stewart 2003, 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

Crundwell, M. P. (2018). Globoconella pseudospinosa, n. sp.: A new Early Pliocene planktonic foraminifera from the Southwest Pacific. Journal of Foraminiferal Research. 48(4): 288-300. gs

Hornibrook, N. d. B. (1981). Globorotalia in the late Pliocene and early Pleistocene of New Zealand. New Zealand Journal of Geology and Geophysics. 24: 263-292. gs

Stewart, D. R. M. I. (2003). Evolution of Neogene globorotaliid foraminifera and Miocene climate change. PhD thesis, Bristol University. 1-269. gs O


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Globorotalia crassaconica compiled by the pforams@mikrotax project team viewed: 15-4-2024

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