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Pseudoguembelina


Classification: pf_mesozoic -> Heterohelicidae -> Pseudoguembelina
Sister taxa: Braunella, Gublerina, Hendersonites, Heterohelix, Huberella, Laeviheterohelix, Lunatriella, Planoglobulina, Planoheterohelix, Praegublerina, Protoheterohelix, Pseudoguembelina, Pseudotextularia, Racemiguembelina, Rectoguembelina, Sigalia, Spiroplecta, Ventilabrella, Zeauvigerina,
Daughter taxa (blue => in age window 0-300Ma)







Taxonomy

Citation: Pseudoguembelina Bronnimann and Brown 1953
Rank: Genus
Basionym: Guembelina excolata
Type species: Guembelina excolata Cushman, 1926

Type images:

Original description: Pseudoguembelina:

Entries in the Catalog of original descriptions: Pseudoguembelina;

Short diagnosis: Test subtriangular in outline, microspheric early stage may have tiny planispiral coil, remainder of test biserial, chambers somewhat inflated, sutures depressed; wall calcareous, low, and somewhat oblique imperforate longitudinal costae parallel the test periphery, intercostal surface perforate; aperture an interiomarginal arch, with secondary sutural apertures along the median zigzag suture between pairs of chambers, partially covered by very finely perforate tubular to flaring flaplike projections and may be bordered by a distinct imperforate lip.

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 Turonian Stage (89.77-93.90Ma, base in Turonian 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. (Editors), (1988). Foraminiferal Genera and Their Classification (Volume I-II). Van Nostrand Reinhold Co., New York, 1059 pp.


Pseudoguembelina compiled by the pforams@mikrotax project team viewed: 30-3-2017

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