Globoturborotalita druryi


Classification: pf_cenozoic -> Globigerinidae -> Globoturborotalita -> Globoturborotalita druryi
Sister taxa: G. tenella, G. rubescens, G. decoraperta, G. apertura, G. connecta, G. druryi, G. nepenthes, G. woodi, G. cancellata, G. occlusa, G. paracancellata, G. pseudopraebulloides, G. barbula, G. bassriverensis, G. brazieri, G. eolabiacrassata, G. euapertura, G. gnaucki, G. labiacrassata, G. martini, G. ouachitaensis, G. sp.,

Taxonomy

Citation: Globoturborotalita druryi (Akers, 1955)
Rank: species
Basionym: Globigerina druryi Akers, 1955
Synonyms:
  • Globigerina (Zeaglobigerina) druryi (Akers, 1955)
Taxonomic discussion: Included in Globoturborotalita by Spezzaferri et al. (2015) but in Globigerina by Aze et al. (2011).

Catalog entries: Globigerina druryi

Type images:

Distinguishing features: Small, compact test, with coarse-pitted surface, and small, rimmed, aperture

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: Trochospiral, compact, sub-globular chambers
Aperture: Umbilical small low arch bordered by a distinct rim [Aze 2011, based on Kennett & Srinivasan 1983]

Wall type: Spinose; Hispid [Aze 2011]

Test morphology: Test small, compact, trochospiral, chambers subglobular, increasing uniformly in size as added, four in the final whorl; sutures radial, depressed; surface coarsely pitted; initial whorls indistinct due to the thickening of the test wall; aperture a small, low arch bordered by a distinct rim. [Kennett & Srinivasan 1983]

Character matrix

test outline:Lobatechamber arrangement:Trochospiraledge view:Equally biconvexaperture:Umbilical
sp chamber shape:Globularcoiling axis:Moderateperiphery:N/Aaperture border:Thin lip
umb chbr shape:Globularumbilicus:Wideperiph margin shape:Broadly roundedaccessory apertures:None
spiral sutures:Weakly depressedumb depth:Deepwall texture:Cancellateshell porosity:Macroperforate: >2.5µm
umbilical or test sutures:Moderately depressedfinal-whorl chambers:4.0-0.0 N.B. These characters are used for advanced search. N/A - not applicable

Biogeography and Palaeobiology


Geographic distribution: A tropical to warm-subtropical species. [Kennett & Srinivasan 1983] Low latitudes [Aze et al. 2011, based on Kennett & Srinivasan (1983)]

[SCOR WG138]


Isotope paleobiology: Aze et al. 2011 ecogroup 1 - Open ocean mixed-layer tropical/subtropical, with symbionts. Based on very heavy ∂13C and relatively light ∂18O. Sources cited by Aze et al. 2011 (appendix S3): this study

Phylogenetic relations:

The small, compact test, coarse- pitted surface, and small rimmed aperture serve to distinguish this species from others of the subgenus Zeaglobigerina. Gg. (Zg.) druryi evolved from Gg. (Zg.) woodi during the Early Miocene Zone N7 and developed into Gg. (Zg.) nepenthes by further elongation of the final chamber. [Kennett & Srinivasan 1983]

Most likely ancestor: Globoturborotalita woodi - at confidence level 2 (out of 5). Data source: Kennett & Srinivasan (1983), however, Aze et al. suggest origin from Globigerina eamesi .
Likely descendants: Globoturborotalita nepenthes;

Biostratigraphic distribution

Geological Range:
Last occurrence (top): within N15 zone (9.83-10.46Ma, top in Tortonian stage). Data source: Kennett & Srinivasan 1983
First occurrence (base): within N7 zone (16.38-17.54Ma, base in Burdigalian stage). Data source: Kennett & Srinivasan 1983

Plot of occurrence data:

Primary source for this page: Kennett & Srinivasan 1983, p.46

References:

Akers, W. H. (1955). Some planktonic foraminifera of the American Gulf Coast and suggested correlations with the Caribbean Tertiary. Journal of Paleontology. 29(4): 647-664. gs

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

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

Spezzaferri, S. et al. (2015). Fossil and genetic evidence for the polyphyletic nature of the planktonic foraminifera "Globigerinoides", and description of the new genus Trilobatus. PLoS One. 1-20. gs


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Globoturborotalita druryi compiled by the pforams@mikrotax project team viewed: 22-10-2019

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Short stable page link: http://mikrotax.org/pforams/index.php?id=104153 Go to Archive.is to create a permanent copy of this page - citation notes



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