CATALOG OF ORIGINAL DESCRIPTIONS: Globigerina angiporoides subsp. minima Jenkins 1966

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 angiporoides minima
Other pages this level: << < G. adriatica, G. aequabilis, G. aequatorialis, 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, > >>

Globigerina angiporoides minima

Citation: Globigerina angiporoides subsp. minima Jenkins 1966
Rank: sub-species
Type locality: F 5179B, S146/531, grid ref. 439437, Sheet S146 (edit.1943), Hampden Beach section, upper blue micaceous clays, 11/4 miles N of Kakaha Creek.New Zealand. Collected by J. Park.
Type age: Bortanian Stage (Middle Eocene).
Holotype Repository: Lower Hutt, New Zealand; New Zealand Geological Survey
Type & figured specimens: TF 1496: holotype and 3 paratypes.

Current identification/main database link: Subbotina minima (Jenkins, 1965)


Original Description
Test free, law trochaspiral, sinistrally coiled,equatorial periphery quadrilobate; axial periphery rounded. Wall calcareous, fairly coarsely perforate. Chambers globular, about 12, arranged in just over 2 whorls with 5 in the first whorl, 4 in the second, and 4 in the final whorl, increasing moderately in size; proloculus diameter approximately 0-02 mm. Sutures on the spiral side radial to slightly curved, slightly depressed; umbilical side radial, depressed. Umbilicus, small, open. Aperture very low, arched, lipped, interiomarginal, umbilical to' extra-umbilical.

Size: Maximum diameter 0.37 mm.

Extra details from original publication
G. angiporoides minima is closely related to G. linaperta but differs from it in not possessing the compressed chambers that are distincttive features of Globigerina linaperta Finlay. Usually G. angiporoides minima is smaller than its descendant, Globigerina angiporoides angiporoides Hornibrook, which occurs in the Upper Eocene and Lower Oligocene of New Zealand, and has a smoother wall ornamentation.
The specimens of G. angiporoides minima from the type sample show a wide variation in test morphology, with low arched, to almost closed apertures, and the final chamber in same specimens larger than the penultimate chamber, whereas in others it is reduced to a small thin-walled flattened bulla.

Editors' Notes
The article was published in the December 1965 issue of the journal but appeared in early 1966, so for taxonomy the correct date is 1966

References:

Jenkins, D. G. (1966b). Planktonic foraminiferal zones and new taxa from the Danian to lower Miocene of New Zealand. New Zealand Journal of Geology and Geophysics. 8: 1088-1126. gs

Olsson, R. K., Hemleben, C., Huber, B. T. & Berggren, W. A. (2006b). Taxonomy, biostratigraphy, and phylogeny of Eocene Globigerina, Globoturborotalita, Subbotina, and Turborotalita. In, Pearson, P. N. , Olsson, R. K. , Hemleben, C. , Huber, B. T. & Berggren, W. A. (eds) Atlas of Eocene Planktonic Foraminifera. Cushman Foundation for Foraminiferal Research, Special Publication. 41(Chap 6): 111-168. gs

Wade, B. S., Olsson, R. K., Pearson, P. N., Edgar, K. M. & Premoli Silva, I. (2018a). Taxonomy, biostratigraphy, and phylogeny of Oligocene Subbotina. In, Wade, B. S. , Olsson, R. K. , Pearson, P. N. , Huber, B. T. & Berggren, W. A. (eds) Atlas of Oligocene Planktonic Foraminifera. Cushman Foundation for Foraminiferal Research, Special Publication. 46(Chap 10): 307-330. gs


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Globigerina angiporoides minima compiled by the pforams@mikrotax project team viewed: 9-4-2020

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