pforams@mikrotax - Pseudoschackoina saundersi pforams@mikrotax - Pseudoschackoina saundersi

Pseudoschackoina saundersi

Classification: pf_mesozoic -> Globigerinelloididae -> Pseudoschackoina -> Pseudoschackoina saundersi
Sister taxa: P. saundersi


Citation: Pseudoschackoina saundersi (Bolli, 1959)
taxonomic rank: Species
Basionym: Planomalina saundersi
Synonyms: Hastigerinoides cepedai

Type images:

Original description: Shape of test planispiral, stellate, biumbilicate, evolute. Wall calcareous, finely perforate. Chambers spherical in early stage, in last whorl becoming more and more elongate and pointed at the outer end; 12-15 chambers arranged in 2.5 whorls. The 5-6 chambers of the last whorl increase fairly rapidly in size. The position of the last chamber is often slightly oblique. Sutures radial, depressed. Aperture a long, low slit, bordered by a rim or lip; equatorial. Relict apertures of earlier chambers of last whorl present but often not clearly visible in examined material.

Entries in the Catalog of original descriptions: Planomalina saundersi, Hastigerinoides cepedai

Character matrix
test outline:Stellatechamber arrangement:Planispiraledge view:aperture:Equatorial
sp chamber shape:Elongatecoiling axis:N/Aperiphery:N/Aaperture border:Thin lip
umb chbr shape:Elongateumbilicus:Wideperiph margin shape:Narrowly roundedaccessory apertures:Relict
spiral sutures:Moderately depressedumb depth:Shallowwall texture:Finely pustuloseshell porosity:Finely Perforate: 1-2.5┬Ám
umbilical or test sutures:Moderately depressedfinal-whorl chambers:5-6 N.B. These characters are used for advanced search. N/A - not applicable

Geological Range:
Last occurrence (top): within T. rohri (-Ma, top in "Holocene" stage). Data source: copied from Chronos database, but zonal name updated from T. bejaouaensis to T. rohri
First occurrence (base): within G. algerianus zone (116.86-118.24Ma, base in Aptian stage). Data source: [copied from Chronos database]

Plot of range and occurrence data:


Bolli, H. M. (1959c). Planktonic foraminifera from the Cretaceous of Trinidad, B. W. I. Bulletins of American Paleontology. 39(179): 253-277. gs

Lipson-Benitah, S. & Almogi-Labin, A. (2004). Aptian planktonic foraminifera from Israel. Israel Journal of Earth Sciences. 53(1): 27-46. gs


Pseudoschackoina saundersi compiled by the pforams@mikrotax project team viewed: 21-7-2024

Taxon Search:
Advanced Search

Short stable page link: Go to to create a permanent copy of this page - citation notes

Add Comment

* Required information
Captcha Image
Powered by Commentics


No comments yet. Be the first!