| Daughter taxa (time control age-window is: 0-800Ma) | ||||
| | | Pseudoschackoina saundersi | |
Taxonomy
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
Geological Range:
Last occurrence (top): within (-Ma, top in "Holocene" stage). Data source:
First occurrence (base): within (-Ma, base in "Holocene" stage). Data source:
Plot of range and occurrence data:
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. gsReferences:
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Pseudoschackoina compiled by the pforams@mikrotax project team viewed: 26-1-2021
Short stable page link: http://mikrotax.org/pforams/index.php?id=110465 Go to Archive.is to create a permanent copy of this page - citation notes |