nmn

Gansserina


Classification: pf_mesozoic -> Globotruncanidae -> Gansserina
Sister taxa: Abathomphalus, Contusotruncana, Dicarinella, Gansserina, Globotruncana, Globotruncanella, Globotruncanita, Loeblichella, Marginotruncana, Radotruncana,
Daughter taxa (blue => in age window 0-300Ma)



Specimens which cannot be assigned to established species

Taxonomy

Citation: Gansserina Robaszynski, Caron, Gonzalez Donoso, and Wonders 1984
Rank: Genus
Basionym: Globotruncana gansseri
Type species: Globotruncana gansseri Bolli, 1951

Type images:

Original description: Gansserina Robaszynski, Caron, Gonzalez Donoso, and Wonders 1984:

Entries in the Catalog of original descriptions: Gansserina;

Short diagnosis: Test in a low to flat trochospiral coil, spiral side flat, umbilical side convex with wide umbilicus that is occupied by portici and tegilla, early chambers globular, later ones rhomboidal in section, sutures strongly curved, elevated and oblique on the spiral side, radial and depressed on the umbilical side, distinct peripheral keel on the edge of the spiral side, the umbilical peripheral margin with a less developed second keel consisting only of a row of pustules or this may be absent, peripheral outline entire to weakly lobulate; wall calcareous, perforate, surface pustulose, particularly on the umbilical side of the test; primary aperture interiomarginal, umbilical, and bordered by a wide porticus, those of successive chambers remaining as accessory apertures, and portici may fuse into tegilla in the later stage.

Geological Range:
Last occurrence (top): within Maastrichtian Stage (66.04-72.05Ma, top in Maastrichtian stage). Data source: Total of range of species in this database
First occurrence (base): within Santonian Stage (83.64-86.26Ma, base in Santonian stage). Data source: Total of range of species in this database

Plot of occurrence data:

NB Plotting of Neptune data has been disabled on the Mesozoic pages because the dataset is both small and badly affected by a few sites with erroneous age models (our obs Huber, Petrizzo, Young, Nov 2016). The data can still be viewed via the range plottertool - tools menu.

References:

Loeblich, A.R., Jr. & Tappan, H., (1988). Foraminiferal Genera and Their Classification (Volume I-II). Van Nostrand Reinhold Co., New York, 1059 pp.

Robaszynski, F.; Caron, M.; Gonzales Donoso, J.M.; Wonders, A.A.H. & the European Working Group on Planktonic Foraminifera, (1984). Atlas of Late Cretaceous globotruncanids. Revue de Micropaleontologie, 26(3-4): 145-305.


logo

Gansserina compiled by the pforams@mikrotax project team viewed: 24-11-2017

Taxon Search:
Advanced Search

Go to Archive.is to create a permanent copy of this page - citation notes



Comments (0)

No comments yet. Be the first!

Add Comment

* Required information
1000
Captcha Image
Powered by Commentics