pforams@mikrotax - Globoturborotalita decoraperta

Globoturborotalita decoraperta


Classification: pf_cenozoic -> Globigerinidae -> Globoturborotalita -> Globoturborotalita decoraperta
Sister taxa: 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 decoraperta (Takayanagi & Saito 1962)
Rank: species
Basionym: Globigerina druryi subsp. decoraperta
Synonyms:

Globigerina (Zeaglobigerina) decoraperta

Catalog entries: Globigerina druryi decoraperta

Type images:

Distinguishing features:
Parent taxon (Globoturborotalita): Trochospiral test with a single, large, open umbilical aperture. Cancellate wall. 4-4½ chambers in final whorl
This taxon: Like G. woodi but higher-spired test

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


Emended description:


Morphology:

Test compact, low to medium- high trochospiral, equatorial periphery lobu- late, chambers spherical to subspherical, four in the final whorl, increasing uniformly in size as added; sutures on spiral and umbilical side almost radial and depressed; umbilicus wide and deep; aperture interiomarginal, umbilical, large semicircular, bordered by a rim. [Kennett & Srinivasan 1983]


Wall type:
Spinose; Cancellate [Aze 2011]

Size:

Character matrix
test outline:Lobatechamber arrangement:Trochospiraledge view:Spiroconvexaperture:Umbilical
sp chamber shape:Globularcoiling axis:Highperiphery: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:4.0-4.0 N.B. These characters are used for advanced search. N/A - not applicable

Biogeography and Palaeobiology


Geographic distribution: Tropical to subtropical. [Kennett & Srinivasan 1983] Low latitudes [Aze et al. 2011, based on Kennett & Srinivasan (1983)]

[SCOR WG138]


Isotope paleobiology: Aze et al. 2011 ecogroup 2 - Open ocean mixed-layer tropical/subtropical, without symbionts. Based on ∂13C lighter than species with symbionts; also with relatively light ∂18O. Sources cited by Aze et al. 2011 (appendix S3): this study

Phylogenetic relations: Gg. (Zg.) decoraperta is distinguished from Gg. (Zg.) woodi by its higher-spired test and from Gg. (Zg.) rubescens mainly by its larger test, slightly smaller aperture, and less coarsely cancellate surface.
Gg. (Zg.) decoraperta appears to have evolved from Gg. (Zg.) woodi during the early Middle Miocene (Orbulina suturalis Zone) in cool subtropical waters and may have given rise to Gg. (Zg.) rubescens during the Middle Pliocene. [Kennett & Srinivasan 1983]

Most likely ancestor: Globoturborotalita woodi - at confidence level 3 (out of 5). Data source: Kennett & Srinivasan 1983, fig.8; Aze et al. 2011.
Likely descendants: Globoturborotalita rubescens; plot with descendants

Biostratigraphic distribution

Geological Range:
Last occurrence (top): in mid part of PL5 [Atl.] zone (51% up, 2.8Ma, in Piacenzian 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).
First occurrence (base): near base of M11 zone (13% up, 11.5Ma, in Tortonian 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 & Srinivasan 1983, p.48

References:

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

Norris, R. D. (1998). Planktonic foraminifer biostratigraphy: Eastern Equatorial Atlantic. Proceedings of the Ocean Drilling Program, Scientific Results. 159: 445-479. gs V O

Takayanagi, Y. & Saito, T. (1962). Planktonic foraminifera from the Nobori formation, Shikoku, Japan. Science Reports of the Tohoku University, Series 2 (Geology). 2(5): 67-105. gs


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Globoturborotalita decoraperta compiled by the pforams@mikrotax project team viewed: 29-9-2022

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