pforams@mikrotax - Pseudoschackoina

Pseudoschackoina


Classification: pf_mesozoic -> Globigerinelloididae -> Pseudoschackoina
Sister taxa: Eohastigerinella, Globigerinelloides, Hastigerinoides, Laeviella, Planohedbergella, Polycamerella, Pseudoschackoina
Daughter taxa (time control age-window is: 0-800Ma)
Pseudoschackoina saundersi

Taxonomy

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

Original description: 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


Emended description:


Morphology:

Wall type:

Size:

Geological Range:
Last occurrence (top): at top of Aptian Stage (98% up, 113.2Ma, in Aptian stage). Data source: Total of range of species in this database
First occurrence (base): in lower part of Aptian Stage (31% up, 122.2Ma, in Aptian stage). Data source: Total of range of species in this database

Plot of range and occurrence data:

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. gs


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Pseudoschackoina compiled by the pforams@mikrotax project team viewed: 5-10-2022

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Short stable page link: https://mikrotax.org/pforams/index.php?id=110465 Go to Archive.is to create a permanent copy of this page - citation notes



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