Catalog - Globorotalia mayeri nympha Catalog - Globorotalia mayeri nympha

CATALOG OF ORIGINAL DESCRIPTIONS: Globorotalia mayeri nympha Jenkins 1967

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 mayeri nympha
Other pages this level: << < G. lupeae, G. magnifica, G. margaritae, G. margaritae evoluta, G. margaritae primitiva, G. marginaculeata, G. marginodentata, G. marginodentata propelleriformis, G. mariae, G. mariae gratiae, G. mariae mariae, G. marksi, G. martinezi, G. mattseensis, G. mayeri, G. mayeri nympha, G. menardii antarctica, G. menardii fijiensis, G. menardii gibberula, G. menardii jamesbayensis, G. menardii miocenica, G. menardii miotumida, G. menardii multicamerata, G. menardii neoflexuosa, G. menardii panda, G. mineacea, G. minuta, G. minutissima, G. miocenica mediterranea, G. miotumida explicationis, G. miozea> >>

Globorotalia mayeri nympha

Citation: Globorotalia mayeri nympha Jenkins 1967
Taxonomic rank: sub-species
Type specimens: N.Z. Geological Survey Register No. TF 1528: holotype and 2 paratypes.
Type age (chronostrat): type Waiauan Stage; G. mayeri mayeri zone (upper part of the Middle Miocene).
Type locality: S167/671, F 14166, grid ref. 784454: Clifden section, up old meander in low bank under willow (reached by boat) where it meets water level. "Nissen shell" bed. Collected by C. A. Fleming, B. L. Wood,and N. de B. Hornibrook.
Type repository: Lower Hutt, New Zealand; New Zealand Geological Survey

Current identification:


Original Description

Test free, low trochospiral, sinistrally coiled, flattened spiral side and convex umbilical side, equatorial periphery lobulate,axial periphery rounded.
Wall calcareous, perforate, progressively thinner walled in the 5 chambers of the final whorl.
Chambers inflated, appressed,13 forming the test, 5 in the first and second whorls, increasing relatively slowly in size but with a thin walled final chamber about half the size of the antepenultimate chamber; proloculus approximately 0.01 mm in diameter.
Sutures on the spiral side radial to slightly curved, umbilical side gently recurved, slightly depressed on both sides. Umbilicus narrow, shallow. Aperture a low, lipped arch, interiomarginal, umbilical-extra-umbilical.

Size:
Maximum diameter 0.24 mm.

Extra details from original publication
The coiling ratio of G. mayeri nympha in the type sample is 10 sinistral to 3 dextral. In this sample G. mayeri nympha is closely related to Globorotalia mayeri continuosa Blow and Globorotalia mayeri mayeri Cushman and Ellisor. G. mayeri nympha differs from G. mayeri continuosa in having 5 chambers in the final whorl, as opposed to 4, and a much lower arched aperture. G. mayeri mayeri is distinguished by having a high arched aperture and a final chamber which is normally larger than the penultimate chamber.

In previous publications G. mayeri nympha has been wrongly identified as Globorotalia acostaensis Blow (Jenkins,
1960-1966b). Dr W. H. Blow has deposited two specimens of G. acostaensis froin the Lower Pliocene of Somaliland
Republic in the foraminiferal collections of the New Zealand Geological Survey and these specimens have been compared
with G. mayeri nympha. It is now apparent that G. acostaensis Blow is larger than G. mayeri nympha, has more inflated
chambers, and also has a larger and better developed aperturallip.

G. mayeri nympha differs from Globorotalia pachyderma (Ehrenberg), which first appears in the lower part of the
Tongaporutuan Stage, in having 5 chambers in the final whorl, a thinner test wall, and slightly recurved
sutures as opposed to the radial sutures of G. pachyderma.


Editors' Notes
Has been combined as Neogloboquadrina nympha

References:

Jenkins, D. G. (1967). Jenkins, D. G. (1967). Planktonic foraminiferal zones and new taxa from the lower Miocene to the Pleistocene of New Zealand. New Zealand Journal of Geology and Geophysics. 10(4): 1064-1078. New Zealand Journal of Geology and Geophysics. 10(4): 1064-1078. gs


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Globorotalia mayeri nympha compiled by the pforams@mikrotax project team viewed: 18-6-2025

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