pforams@mikrotax - Praegublerina pseudotessera

Praegublerina pseudotessera

Classification: pf_mesozoic -> Heterohelicidae -> Praegublerina -> Praegublerina pseudotessera
Sister taxa: P. acuta, P. pseudotessera, P. robusta, P. sp.


Citation: Praegublerina pseudotessera (Cushman, 1938)
Rank: species
Basionym: Guembelina pseudotessera

Type images:

Original description: Test compressed 1½ - 2 times as long as broad, rapidly tapering with greatest breadth at the last pair of chambers, periphery indented throughout; chambers somewhat inflated, broader than high throughout, in the adult somewhat curved and broader; sutures depressed, somewhat curved in the last portion; wall smooth and polished, very finely perforate; aperture very high, arched opening with a slight lip and distinct flanges, but not extending far onto the preceding chamber. 

Entries in the Catalog of original descriptions: Guembelina pseudotessera

Emended description:

Georgescu, Saupe & Huber, 2009, p.404: "Test biserial throughout. The chambers are subrectangular in the earlier part of the test and become reniform in the adult stages. The periphery is broadly rounded without peripheral structures. Sutures are distinct, depressed, and oblique to the longitudinal axis of the test. There are distinctly depressed subtriangular areas on each side of the central zigzag suture, which are generated by the divergent rows of biserial chambers and gradual development of the periapertural flaps. Aperture is a low or medium high arch at the base of the apertural face of the final chamber, bordered by two well-developed flanges. The test is ornamented with fine and discontinuous costae, which are 2.5 to 4.0 microns in width. Test wall is microperforate, pore diameter ranging between 0.4 and 0.8 microns." [copied from Chronos database]


Wall type:


Character matrix
test outline:Subtriangularchamber arrangement:Biserialedge view:Compressedaperture:Interiomarginal
sp chamber shape:Reniformcoiling axis:N/Aperiphery:N/Aaperture border:Thin flange
umb chbr shape:Reniformumbilicus:N/Aperiph margin shape:Broadly roundedaccessory apertures:None
spiral sutures:Strongly depressedumb depth:N/Awall texture:Smoothshell porosity:Microperforate: <1µm
umbilical or test sutures:Moderately depressedfinal-whorl chambers:2.0-2.0 N.B. These characters are used for advanced search. N/A - not applicable

Geological Range:
Last occurrence (top): within A. mayaroensis zone (67.30-69.18Ma, top in Maastrichtian stage). Data source: [copied from Chronos database]
First occurrence (base): within G. elevata zone (79.20-84.19Ma, base in Santonian stage). Data source: [copied from Chronos database]

Plot of range and occurrence data:


Cushman, J. A. (1938). Cretaceous species of Guembelina and related genera. Contributions from the Cushman Laboratory for Foraminiferal Research. 14: 2-28. gs V O


Praegublerina pseudotessera compiled by the pforams@mikrotax project team viewed: 28-9-2022

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Comments (1)

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Le Coze

Guembelina pseudotessera Cushman, 1938 is the type species of Tesseraella Aliyulla, 1977 (a subjective junior synonym of Spiroplecta according to L&T). If it is to be accepted under Praegublerina then Praegublerina should be considered as a subjective junior synonym of Tesseraella (reinstated).

Merry Christmas & Happy new year,


Jeremy Young (UK)

Hi Francois

Thanks for pointing that out. Actually though the species Praegublerina pseudotessera has been deleted from the working taxonomy and you managed to get to the deleted entry -so this is a mostly case of me needing to clean up the program code to avoid non-editors viewing deleted taxa.


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