Globorotalia hirsuta

NB TAXA WHICH ORIGINATE IN THE OLIGOCENE ARE NOT INCLUDED YET
Classification: pf_neogene -> Globorotalidae -> Globorotalia -> hirsuta lineage -> Globorotalia hirsuta
Sister taxa: G. evoluta, G. gigantea, G. praemargaritae, G. primitiva, G. hirsuta, G. theyeri, G. margaritae, G. juanai, G. cibaoensis, G. scitula, G. challengeri, G. praescitula,

Taxonomy

Citation: Globorotalia hirsuta (d’Orbigny, 1839)
Rank: species
Basionym: Rotalina hirsuta
Taxonomic discussion: neotype designated by Banner & Blow 1960

Catalog entries: Rotalina hirsuta;

Type images:

Short diagnosis: Keel & spirally convex shell

NB The short diagnoses are used in the tables of daughter-taxa to act as quick summaries of the differences between e.g. species of one genus. They have initially been copied from the diagnostic characters/distinguishing features sections of the Eocene and Paleocene Atlases, they will be edited as the site is developed.

Description


Diagnostic characters: Large, high trochospiral, highly convex on spiral side, concave on umbilical side

Aperture: : Interiomarginal umbilical-extraumbilical low arch bordered by a thin lip [Aze 2011, based on Kennett & Srinivasan 1983]

Coiling direction (in extant population): mixed with bias to dextral


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

Size: >250µm

Biogeography and Palaeobiology


Isotope paleobiology: Aze et al. 2011 ecogroup 4 - Open ocean sub-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 79 sequences. References: André et al. 2014; Ujiié & Lipps 2009.

Most likely ancestor: Globorotalia margaritae - at confidence level 3 (out of 5). Data source: Kennett & Srinivasan 1983, fig 15.

Biostratigraphic distribution

Geological Range:
Last occurrence (top): Extant Data source: present in the plankton (SCOR WG138)
First occurrence (base): in lower part of PT1b subzone (26% up, 0.5Ma, in Ionian stage). Data source: Wade et al. (2011), additional event; position within zone determined by linear interpolation from data in table 1 of Wade et al. (2011).

Plot of occurrence data:

Primary source for this page: Kennett & Srinivisan 1983, p.138

References:

André, A. & others, (2014). SSU rDNA Divergence in Planktonic Foraminifera: Molecular Taxonomy and Biogeographic Implications. PLoS One, 9: e104641.

Aze, T.; Ezard, T.H.G.; Purvis, A.; Coxall, H.K.; Stewart, D.R.M.; Wade, B.S. & Pearson, P.N.P., (2011). A phylogeny of Cenozoic macroperforate planktonic foraminifera from fossil data. Biological Reviews, 86: 900-927.

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

d'Orbigny, A., (1839). Foraminiferes. In: de la Sagra, R. (Editor), Histoire physique et naturelle de l'Ile de Cuba. A. Bertrand, Paris, France, pp. 224.

Kennett, J.P. & Srinivasan, M.S., (1983). Neogene Planktonic Foraminifera. Hutchinson Ross Publishing Co., Stroudsburg, Pennsylvania, 1-265 pp.

Ujiié, Y. & Lipps, J.H., (2009). Cryptic diversity in planktonic foraminifera in the northwest Pacific ocean. J. Foraminifer. Res., 39: 145–154.


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Globorotalia hirsuta compiled by the pforams@mikrotax project team viewed: 19-11-2017

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