pforams@mikrotax - Globoturborotalita rubescens

Globoturborotalita rubescens


Classification: pf_cenozoic -> Globigerinidae -> Globoturborotalita -> Globoturborotalita rubescens
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 rubescens (Hofker, 1956)
Rank: species
Basionym: Globigerina rubescens
Synonyms:
  • Globigerina (Zeaglobigerina) rubescens
  • Globigerina rosacea Bermudez & Seglie 1963 [according to Brummer & Kucera 2022]
Variants:

Catalog entries: Globigerina rubescens, Globoturborotalita decorata, Globigerina rosacea

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. decoraperta but very small and with small circular aperture, shell usually reddish.

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 small, trochospiral, equatorial periphery lobulate, chambers spherical to subspherical, four in the final whorl, increasing rapidly in size as added; sutures on both sides radial to slightly curved, gently depressed; surface distinctly cancellate; aperture small, rounded, bordered by a distinct rim, umbilical. [Kennett & Srinivasan 1983]

Wall type:
Spinose; Cancellate [Aze 2011]

Size:
<150µm

Character matrix
test outline:Lobatechamber arrangement:Trochospiraledge view:Concavo-convexaperture: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:4.0-4.0 N.B. These characters are used for advanced search. N/A - not applicable

Biogeography and Palaeobiology


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

In modern oceans a common, warm water, species [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 Cited sources (Aze et al. 2011 appendix S3): this study

Phylogenetic relations: This species is distinguished from Gg. (Zg.) decoraperta by its very small test size and small circular aperture. Gg. (Zg.) rubescens seems to have evolved from Gg. (Zg.) decoraperta during the Middle Pliocene and may be the modern representative of the subgenus Zeaglobigerina. Hofker 1977) placed this species within Globoturborotalita, which may have priority over Zeaglobigerina if Gg. (Zg.) rubescens is phylogenetically linked with the Zeaglobigerina lineage. [Kennett & Srinivasan 1983]

Molecular Genotypes recognised (data from PFR2 database, June 2017), one genotype only from 9 sequences. Reference: Seears et al. 2012.

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

Biostratigraphic distribution

Geological Range:
Last occurrence (top): Extant. Data source: present in the plankton (SCOR WG138)
First occurrence (base): within N20 zone (3.10-4.37Ma, base in Zanclean stage). Data source: Chaisson & Pearson (1997)

Plot of occurrence data:

Primary source for this page: Kennett & Srinivasan 1983, p.50

References:

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

Brummer, G-J. A. & Kucera, M. (2022). Taxonomic review of living planktonic foraminifera. Journal of Micropalaeontology. 41: 29-74. gs V O

Hofker, J. (1956c). Foraminifera Dentata, foramonifera of Santa Cruz and Thatch-Island, Virginia-Archipelago West-Indies. Copenhagen Univ. Zool. Mus. Spolia (Skrifler). 15: 1-237. gs

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

Lam, A. & Leckie, R. M. (2020a). Late Neogene and Quaternary diversity and taxonomy of subtropical to temperate planktic foraminifera across the Kuroshio Current Extension, northwest Pacific Ocean. Micropaleontology. 66(3): 177-268. gs

Loeblich, A. & Tappan, H. (1994). Foraminifera of the Sahul shelf and Timor Sea. Cushman Foundation for Foraminiferal Research, Special Publication. 31: 1-661. gs V O

Seears, H. A., Darling, K. F. & Wade, C. M. (2012). Ecological partitioning and diversity in tropical planktonic foraminifera. BMC Evolutionary Biology. 12(54): 1-15. gs V O

Siccha, M. & Kucera, M. (2017). ForCenS, a curated database of planktonic foraminifera census counts in marine surface sediment samples. Scientific Data. 4(1): 1-12. gs

Todd, R. (1957). Smaller foraminifera, in Geology of Saipan, Mariana Islands, Pt. 3, Paleontology. U.S. Geological Survey, Professional Paper. 280-H: 265-320. gs V O


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Globoturborotalita rubescens compiled by the pforams@mikrotax project team viewed: 28-9-2022

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