CATALOG OF ORIGINAL DESCRIPTIONS: Globorotalia australiformis 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 -> Globorotalia -> Globorotalia australiformis
Other pages this level: << < G. amuria, G. andalusiana, G. anfracta, G. angulata abundocamerata, G. angulata kubanensis, G. angulata praepentacamerata, G. apanthesma, G. apertura, G. aragonensis, G. aragonensis araratica, G. aragonensis caucasica, G. aragonensis incisimarginata, G. aragonensis twisselmanni, G. archeomenardii, G. armenica, G. australiformis, G. avanensis, G. barisanensis, G. bella, G. berggreni, G. bermudezi, G. berwaliana, G. birnageae, G. bollii, G. bonairensis, G. bononiensis, G. bouregregensis, G. broedermanni lodoensis, G. bullbrooki, G. bykovae, G. bykovae minoritesta, > >>

Globorotalia australiformis

Citation: Globorotalia australiformis Jenkins 1966
Rank: Species
Type locality: S68/201, F 5671, grid ref. 989143, Middle Waipara River section, sandy marl overlying Waipara Greensand 30 chains NW of gorge. Collected by J. Healy.
Type age: Upper part of the Waipawan Stage (Lower Eocene).
Holotype Repository: Lower Hutt, New Zealand; New Zealand Geological Survey
Type & figured specimens: TF 1503: holotype and 2 paratypes.

Current identification/main database link: Globanomalina australiformis (Jenkins 1966)


Original Description
Test free, sinistrally coiled, small, low trochospiral, biconvex, equatorial periphery quadrilobate; axial periphery rounded in the first 3 chambers of the final whorl, but angled with an incipient keel in the final chamber. Wall calcareous, finely perforate, surface smooth. Chambers compressed, 13 chambers in about 2 1/2 whorls, with 5 chambers in the first whorl and 4 in the last, increasing fairly rapidly in size; proloculus diameter approximately 0.01-0.02 mm. Sutures recurved on spiral side and nearly radial on the umbilical side; slightly depressed on both sides. Umbilicus small, open. Aperture a low arch interiomarginal, extraumbilical-umbilical.

Size: Maximum diameter: 0.26 mm.

Extra details from original publication
REMARKS: G. australiformis is closely related to the following Upper Paleocene to Lower Eocene species, from which it differs only in being
smaller and in having 4 chambers in the final whorl: Globorotalia pseudomenardii Bolli, Globorotalia pseudoscitula Glaessner, Globorotalia planoconica Subbotina, Globorotalia haunsbergensis Gohrbrandt, Globorotalia elongata Glaessner, Globorotalia ebrenbergi Bolli, and Globorotalia chapmani Parr.
In the Middle Waipara River section (Wilson, 1963) and in the Te Uri Stream section, G. australiformis replaces Globorotalia pseudomenardii Bolli in the lower part of the Waipawan Stage.
Although the coiling of the G. australiformis specimens in the type sample is 48 dextral and 38 sinistral, within its stratigraphic range G.
austraiiformis does not show strong preference to a particular coiling direction.
The specific name is taken from the Latin word australis meaning southern.

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 [1965](6): 1088-1126. gs :: ::


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Globorotalia australiformis compiled by the pforams@mikrotax project team viewed: 8-8-2020

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