Daughter taxa (time control age-window is: 0-800Ma) | ||||
Pseudoguembelitria blakenosensis | ||||
Pseudoguembelitria sp. Specimens which cannot be assigned to established species |
Taxonomy
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 Paraticinella rohri zone (100% up, 113.2Ma, in Albian stage). Data source: Total of ranges of the species in this database
First occurrence (base): within Hedbergella infracretacea zone (116.60-116.86Ma, base in Aptian stage). Data source: Total of ranges of species in this database
Plot of range and occurrence data:
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. gsReferences:
Pseudoguembelitria compiled by the pforams@mikrotax project team viewed: 14-12-2024
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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