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.
Current identification:
Original Description
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:
Extra details from original publication
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
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 References:
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Globorotalia mayeri nympha compiled by the pforams@mikrotax project team viewed: 18-6-2025
Short stable page link: https://mikrotax.org/pforams/index.php?id=131191 Go to Archive.is to create a permanent copy of this page - citation notes |
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