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Pseudoschackoina


Classification: pf_mesozoic -> Globigerinelloididae -> Pseudoschackoina
Sister taxa: Eohastigerinella, Globigerinelloides, Hastigerinoides, Pseudoschackoina,
Daughter taxa (blue => in age window 0-300Ma)

Taxonomy

Citation: Pseudoschackoina Verga & Premoli Silva 2005
Rank: Genus
Basionym: Pseudoschackoina saundersi (Bolli, 1959)

Type images:

Original description: Pseudoschackoina Verga & Premoli Silva 2005: Test small to medium, pseudoplanispiral, slightly dysaxial, evolute and laterally compressed; 2- 2.5 whorls; chambers in the outer whorl increasing rather fast in size as added; first chambers spherical to subspherical, the last two or three radially elongate, forward-directed and pointed, bearing tubulospines (frequently broken); peripheral outline substellate to stellate; sutures straight to slightly curved, radial and depressed; umbilical area medium wide and shallow; aperture an asymmetrical arch straddling the periphery, bordered by a thin lip; relict apertures at time observed. Wall smooth, finely perforate.

Entries in the Catalog of original descriptions: Pseudoschackoina;

Geological Range:
Last occurrence (top): within (-Ma, top in "Holocene" stage). Data source:
First occurrence (base): within (-Ma, base in stage). Data source:

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:

Verga, D. & Premoli Silva, I., (2005). Early Cretaceous planktonic Foraminifera from the Tethys; the upper Aptian, planispiral morphotypes with elongate chambers. Cretaceous Research, 26(2): 239-259.


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

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