CATALOG OF ORIGINAL DESCRIPTIONS: Globorotalia aequa subsp. bullata 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 aequa bullata
Other pages this level: G. cerroazulensis, G. acostaensis, G. acostaensis trochoidea, G. acrostoma, G. acrostoma partimlabiata, G. acutispira, G. adamantea, G. aequa bullata, G. africana, G. akersi, G. albeari, G. almadenensis, G. amuria, G. andalusiana, G. anfracta, G. angulata abundocamerata, G. angulata kubanensis, G. angulata praepentacamerata, G. apanthesma, G. apertura, G. aragonensis, G. aragonensis araratica, > >>

Globorotalia aequa bullata

Citation: Globorotalia aequa subsp. bullata Jenkins 1966
Rank: sub-species
Type locality: S68/199, F 5668, grid ref. 989143, from the Middle Waipara River section, sandy marl overlying Waipara Greensand: glauconitic base of marIon top of greensand, 20 chains NW of gorge, left bank. Collected by J. Healy.
Type age: (Upper Paleocene)
Type sample and level: lower part of Waipawan Stage
Holotype Repository: Lower Hutt, New Zealand; New Zealand Geological Survey
Type & figured specimens: TF 1502: holotype and 2 paratypes.

Current identification/main database link: Morozovella aequa (Cushman and Renz 1942)
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


Original Description
Test free, low trochospiral, dextrally coiled, unequally biconvex with the umbilical side the more strongly convex; periphery
sharply angled with a narrow keel, having occasional short spines;peripheral outline lobulate. Wall calcareous, perforate, covered with small pustules. Chambers compressed, angular, inflated, increasing rapidly in size in the final whorl, with a very large normal-shaped penultImate chamber followed by the small convex-shaped bulla-like final chamber which completely obscures the aperture. Sutures on the spiral side strongly recurved, slightly depressed; umbilical side, radial, depressed. Umbilicus small, shallow, open.

Size: Largest diameter 0.58 mm

Extra details from original publication
REMARKS: Goborotalia aequa bullata is a distinctive form closely related to Globorotalia aequa aequa Cushman and Renz but is distinguished by a bulla-like final chamber. A bulla is a common morphological feature amongst species of Globigerina, numerous genera and species having been erected to distinguish taxa possessing this feature (Loeblich and Tappan, 1957).
Bullae are uncommon features in Gioborotalia, although Morrow (1934, fide Ellis and Messina, 1940 et seq.) illustrated a specimen of Globorotalia cushmani Morrow with a bulla. Loeblich and Tappan (1957) illustrated a specimen of Globorotalia aequa with a bulla, which they regarded as a dwarfed chamber, of no taxonomic significance.

References:

Jenkins, D.G., (1966). 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.


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Globorotalia aequa bullata compiled by the pforams@mikrotax project team viewed: 22-7-2018

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