CATALOG OF ORIGINAL DESCRIPTIONS: Globigerina antarctica Keany & Kennett 1972

This page provides data from the catalog of type descriptions. The catalog is sorted alphabetically. Use the current identification link to go back to the main database.


Higher levels: pf_cat -> G -> Globigerina -> Globigerina antarctica
Other pages this level: << < G. aequilateralis, G. aequilateralis involuta, G. affinis, G. alanwoodi, G. almadenensis, G. alpigena, G. altispira, G. ampliapertura, G. ampliapertura cancellata, G. anconitana, G. angipora, G. angiporoides, G. angiporoides minima, G. angulata, G. anguliofficinalis, G. antarctica, G. antillensis, G. apertura, G. applanata, G. aptica, G. aquiensis, G. arabica, G. archaeobulloides, G. ariakensis, G. aspensis, G. aspera, G. asperula, G. atlantica, G. atlantis, G. atlantisae, G. aumalensis> >>

Globigerina antarctica

Citation: Globigerina antarctica Keany & Kennett 1972
Rank: species
Type locality: U.S.N.S. ELTANIN core E 36-14, taken from a depth of 3054 meters at lat. 58°06' S., long. 150° 10' E., northern Antarctic Sea between Australia and Antarctica; holotype (no. 6) and one figured paratype (no. 1) from 500-502 cm. depth in the core; three figured paratypes (nos. 2-4), from 250-252 cm. depth: and one figured paratype (no. 5) from 520-522 cm. depth. Found in greatest abundances in cores taken immediately south of the Antarctic Convergence.
Type age (chronostrat): Lower Pleistocene; and ranges throughout the stratigraphic section assignable to the Matuyama Reversed Polarity Epoch (0.7 to 2.43 million years BP).
Type specimens: tf. 3, no. 1-6; holotype (no. 6), no. 183690; and paratypes (nos. 1-5), nos. 183691-183695, respectively.
Type repository: USNM;

Linked specimens: USNM-183695 USNM-183694 USNM-183692 USNM-183693 USNM-183691 USNM-183690

Current identification/main database link: Globigerina falconensis Blow, 1959


Original Description
"Test of moderate size, moderately to highly lobulate with a low spire, fairly uniform increase in chamber size until the final chamber which is commonly the same size or smaller than the penultimate chamber. Mostly 4, occasionally 5 chambers in the final whorl; 12-14 in the test. Aperture is umbilical to extraumbilical in position and is a large arched opening, usually with a distinct lip. Test wall calcareous, perforate, often shiny (with light microscope). Surface of final chamber generally smoother and more shiny than earlier chambers which have rougher texture. Surface roughness more distinct when viewed with scanning electron microscope. Slight dominance of left-coiling forms.

"Variability. - The most variable morphological features include the number of chambers in the final whorl (4 to 5) and the position of the aperture which ranges from umbilical to extraumbilical in position.

Size: "Dimensions. - Holotype (no. 6) greatest diameter 0.30 mm.; paratypes (nos. 1-5) greatest diameter 0.40 mm.

Extra details from original publication
"Remarks. - Similar to Globigerina bulloides but differs in being more lobulate, in having a distinct lip, smoother test wall and the tendency to have a smaller final chamber. Differs from Globigerina falconensis Blow in being less lobulate, in having a smoother test wall, and more highly arched aperture. lt differs from Globigerina parabulloides Blow in being less compact, more lobulate and in having a less uniformly arched and larger aperture. Both G. falconensis and G. parabulloides are of warmer-water habitat than G. antarctica." 

References:

Keany, J. & Kennett, J. P. (1972). Pliocene-early Pleistocene paleoclimatic history recorded in Antarctic-subantarctic deep-sea cores,. Deep-Sea Research. 19(8): 529-548. gs

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Globigerina antarctica compiled by the pforams@mikrotax project team viewed: 28-1-2021

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