pforams@mikrotax - Pseudoguembelitria

pforams@mikrotax - Pseudoguembelitria pforams@mikrotax - Pseudoguembelitria

Pseudoguembelitria

Classification: pf_mesozoic -> Hedbergellidae -> Pseudoguembelitria
Sister taxa: Asterohedbergella, Clavihedbergella, Costellagerina, Falsotruncana, Hedbergella, Helvetoglobotruncana, Liuenella, Microhedbergella, Muricohedbergella, Paracostellagerina, Paraticinella, Praeglobotruncana, Pseudoguembelitria, Whiteinella

Daughter taxa (time control age-window is: 0-800Ma)
			Pseudoguembelitria blakenosensis
			Pseudoguembelitria sp. Specimens which cannot be assigned to established species

Taxonomy

Citation: Pseudoguembelitria Huber and Leckie 2011

Rank: Genus

Type species: Pseudoguembelitria blakenosensis Huber and Leckie, 2011

Taxonomic discussion: Pseudoguembelitria differs from Hedbergella by having a higher trochospire, more weakly developed perforation cones on the test surface, and fewer chambers in the final whorl. It differs from Guembelitria Cushman, 1933 (late Campanian–early Paleocene) and Archaeoguembelitria Georgescu, 2009 (late Albian–early Turonian) by the early hedbergellid stage and variable trochospire, lower in the early stage and higher in the adult. It differs from Gubkinella (considered by Loeblich and Tapan [1987] to be a benthic foraminifer) in having perforation cones, moreinflated chambers, and a higher-arched aperture, and in lacking a lip.

Original description: Test wall microperforate with pores surrounded by small-sized perforation cones; pustules may be present in the umbilical region. Test small, with early hedbergellid stage and higher trochospire in the adult. Chambers coiled in a variable trochospire with 4.5–5.0 chambers in the initial whorl and 3–4 chambers in the final whorl. Aperture a low interiomarginal, umbilical-extraumbilical arch without periapertural structures

Entries in the Catalog of original descriptions: Pseudoguembelitria

Distinguishing features:
Parent taxon (Hedbergellidae): Test trochospirally coiled, primary aperture interiomarginal, extraumbilical-umbilical, with prominent apertural lip, apertures of earlier chambers remain visible around the umbilical region; no sutural secondary apertures.
This taxon: Test wall microperforate with pores surrounded by small-sized perforation cones; pustules may be present in the umbilical region. Test small, with early hedbergellid stage and higher trochospire in the adult. Chambers coiled in a variable trochospire with 4.5–5.0 chambers in the initial whorl and 3–4 chambers in the final whorl. Aperture a low interiomarginal, umbilical-extraumbilical arch without periapertural structures.

Geological Range:
Last occurrence (top): at top of Aptian Stage (97% up, 113.4Ma, in Aptian stage). Data source: Total of range of species in this database
First occurrence (base): in upper part of Aptian Stage (56% up, 118.8Ma, in Aptian stage). Data source: Total of range of species in this database

Plot of range and occurrence data:

Range-bar - range as quoted above, pink interval top occurs in, green interval base occurs in.
Triangles indicate an event for which a precise placement has been suggested
Neptune data: This is a higher taxon page so Neptune data is not plotted. See also: customisable plot Parent: Hedbergellidae

References:

Huber, B. T. & Leckie, R. M. (2011). Planktic foraminiferal species turnover across deep-sea Aptian/Albian boundary sections. Journal of Foraminiferal Research. 41: 53-95. gs

Pseudoguembelitria compiled by the pforams@mikrotax project team viewed: 20-3-2023

Taxon Search:

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AphiaID: 1035848 Nomenclatural data on WoRMS
Short stable page link: https://mikrotax.org/pforams/index.php?id=110459 Go to Archive.is to create a permanent copy of this page - citation notes

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