Globigerinita parkerae


Classification: pf_cenozoic -> Globigerinitidae -> Globigerinita -> Globigerinita parkerae
Sister taxa: G. glutinata, G. parkerae, G. minuta, G. uvula, G. sp.,

Taxonomy

Citation: Globigerinita parkerae (Bermudez 1961)
Rank: species
Basionym: Globigerinoides parkerae Bermudez 1961
Synonyms: Globigerinita flparkerae Bronnimann & Resig 1971

Catalog entries: Globigerinoides parkerae, Globigerinita glutinata flparkerae

Type images:

Distinguishing features: Like Ga. glutinata but with supplementary apertures on the spiral side

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: Test distinctly trochospiral , equatorial periphery lobulate; chambers spherical to ovate; 3 to 4 chambers of the final whorl, increasing rapidly in size; sutures slightly curved to radial, depressed; surface smooth, very finely perforate, largely covered with crystallites or small, subconia! tubercles; umbilicus deep , primary aperture umbilical, a rather low arch bordered by a thin lip , rounded supplementary apertures on the spiral sutures of the final chamber, bordered by thin lips. [Kennett & Srinivasan 1983]

Character matrix

test outline:Lobatechamber arrangement:Trochospiraledge view:Equally biconvexaperture:Umbilical
sp chamber shape:Globularcoiling axis:Low-moderateperiphery:N/Aaperture border:Thin lip
umb chbr shape:Globularumbilicus:Narrowperiph margin shape:Broadly roundedaccessory apertures:Sutural
spiral sutures:Weakly depressedumb depth:Deepwall texture:Finely pustuloseshell porosity:Microperforate: <1µm
umbilical or test sutures:Moderately depressedfinal-whorl chambers:3.0-4.0 N.B. These characters are used for advanced search. N/A - not applicable

Biogeography and Palaeobiology


Geographic distribution: Tropical. [Kennett & Srinivasan 1983]

Phylogenetic relations: Ga. parkerae is distinguished from Ga. glutinata by the presence of supplementary apertures on the spiral side. Ga. parkerae developed from Ga. glutinata in the Middle Miocene.
This species appears to be ancestral to Candeina nitida. [Kennett & Srinivasan 1983]

Most likely ancestor: Globigerinita glutinata - at confidence level 3 (out of 5). Data source: Kennett & Srinivasan 1983, fig 25.
Likely descendants: Candeina nitida;

Biostratigraphic distribution

Geological Range:
Last occurrence (top): Extant Data source: described as extant by Kennett & Srinivasan but not recognised by WG138
First occurrence (base): within N13 zone (11.63-11.79Ma, base in Serravallian stage). Data source: Kennett & Srinivasan 1983

Plot of occurrence data:

Primary source for this page: Kennett & Srinivasan 1983, p.226

References:

Bermudez, P. J. (1961). Contribucion al estudio de las Globigerinidea de la region Caribe-Antillana (Paleoceno-Reciente). Editorial Sucre, Caracas. 1119-1393. gs

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


logo

Globigerinita parkerae compiled by the pforams@mikrotax project team viewed: 24-10-2019

Taxon Search:
Advanced Search

Short stable page link: http://mikrotax.org/pforams/index.php?id=104054 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