Gallitellia vivans


Classification: pf_cenozoic -> Benthic origins -> Gallitellia -> Gallitellia vivans
Sister taxa: G. vivans, G. sp.,

Taxonomy

Citation: Gallitellia vivans (Cushman, 1934)
Rank: species
Basionym: Guembelitria vivans Cushman, 1934
Synonyms:

Catalog entries: Guembelitria vivans

Type images:

Distinguishing features: monospecific

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


Test morphology: Remarks: Gallitellia vivans has globular chambers and deeply depressed sutures. Its aperture is a small symmetric arc at the base of the last chamber. Some full grown specimens show the development of multiserial chambers. [Kroon & Nederbragt 1990]

Character matrix

test outline:Subtriangularchamber arrangement:Triserialedge view:Equally biconvexaperture:Umbilical
sp chamber shape:Globularcoiling axis:Highperiphery:N/Aaperture border:Thin lip
umb chbr shape:Globularumbilicus:Narrowperiph margin shape:Broadly roundedaccessory apertures:None
spiral sutures:Strongly depressedumb depth:Shallowwall texture:Smoothshell porosity:Microperforate: <1µm
umbilical or test sutures:Strongly depressedfinal-whorl chambers:3.0-3.0 N.B. These characters are used for advanced search. N/A - not applicable

Biogeography and Palaeobiology


Geographic distribution: Gallitellia vivans has been reported from Recent and Quaternary sediments in the Pacific, the Indian Ocean, Indonesia and the Gulfof Mexico. We found living G. vivans in Snellius Cruise G0 plankton tow samples (see Fig. 2). [Kroon & Nederbragt 1990]

Isotope paleobiology: G. vivans is a member of the planktic foraminiferal population; its 18O/16O ratio is ~ 5.3ppt, lighter than that of the benthics and lies between those of G. trilobus and G. menardii. It appears that G. vivans lives somewhat deeper in the water column than the surface dwelling spinose species, but its exact vertical position remains unclear, since the magnitude of the vital effect on the oxygen isotope ratios is unknown. From the oxygen isotopic data and its distribution pattern we conclude that G. vivans is a planktic species, that is brought to the surface in upwelling ares or, to a lesser extent, by mixing at the base of the thermocline [Kroon & Nederbragt 1990]

Phylogenetic relations: Molecular genetic data of Ujiie et al. (2018) indicates that G. vivans is unrelated to other extant planktonic forminifera and closest to the benthic foraminifera Stainforthia. It thus represents a separate adoption of planktonic habitat. It is also well separated from Streptochilus.
Molecular Genotypes recognised (data from PFR2 database, June 2017), one genotype only from 5 sequences. References: Ujiie et al. 2008.

Most likely ancestor: benthic ancestor - at confidence level 3 (out of 5). Data source: .

Biostratigraphic distribution

Geological Range:
Notes: We found G. vivans in a late Pliocene sample from Timor, Indonesia, sample Tim179 (for details, see De Smet et al., submitted (b) [Kroon & Nederbragt 1990]
Last occurrence (top): Extant Data source: Kroon & Nederbragt 1990
First occurrence (base): within Late Pliocene Sub-Epoch (2.59-3.60Ma, base in Piacenzian stage). Data source: Kroon & Nederbragt 1990

Plot of occurrence data:

References:

Cushman, J. A. (1934a). A Recent Guembelitria (? ) from the Pacific. Contributions from the Cushman Foundation for Foraminiferal Research. 10: 105-. gs

Kroon, D. & Nederbragt, A. J. (1990). Ecology and paleoecology of triserial planktic foraminifera. Marine Micropaleontology. 16: 25-38. 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

Ujiie, Y., Kimoto, K. & Pawlowski, J. (2008). Molecular evidence for an independent origin of modern triserial planktonic foraminifera from benthic ancestors. Marine Micropaleontology. 69: 334-340. gs


logo

Gallitellia vivans compiled by the pforams@mikrotax project team viewed: 14-11-2019

Taxon Search:
Advanced Search

Short stable page link: http://mikrotax.org/pforams/index.php?id=104032 Go to Archive.is to create a permanent copy of this page - citation notes



Comments (0)

No comments yet. Be the first!

Add Comment

* Required information
1000
Captcha Image
Powered by Commentics