Taxonomy
Original description: Test lobulate, biumbilicate, planispirally coiled, with 6-7 chambers in the last whorl. Chambers spherical, rapidly increasing in size particularly when seen from peripheral view. Umbilici deep and moderately large. Test covered by fine to medium, papillae. Sutures radial, depressed, straight. Aperture equatorial in position, a lowly arched opeing at the base fo the last chamber. Relict apertures and relict apertural flaps well developed. Outer wall radial hyaline perforate; septal wall and relict apertural flaps microgranular hyaline.
Entries in the Catalog of original descriptions: Globigerinelloides prairiehillensis
Character matrix
test outline: | Ovate | chamber arrangement: | Planispiral | edge view: | Hourglass | aperture: | Equatorial |
sp chamber shape: | N/A | coiling axis: | N/A | periphery: | N/A | aperture border: | Thin lip |
umb chbr shape: | Inflated | umbilicus: | Wide | periph margin shape: | Moderately rounded | accessory apertures: | Relict |
spiral sutures: | N/A | umb depth: | Deep | wall texture: | Finely muricate | shell porosity: | Finely Perforate: 1-2.5µm |
umbilical or test sutures: | Moderately depressed | final-whorl chambers: | 6-7 | N.B. These characters are used for advanced search. N/A - not applicable |
Most likely ancestor: Planohedbergella aspera - at confidence level 3 (out of 5). Data source: Huber et al. 2022 fig. 2.
Likely descendants: Planohedbergella yaucoensis;
plot with descendants
Geological Range:
Last occurrence (top): within A. mayaroensis zone (67.64-69.27Ma, top in Maastrichtian stage). Data source: [copied from Chronos database]
First occurrence (base): within D. concavata zone (85.60-89.75Ma, base in Turonian stage). Data source: Huber et al. 2022
Plot of range and occurrence data:
Huber, B. T., Petrizzo, M. M. & Falzoni, F. (2022b). Taxonomy and phylogeny of Albian–Maastrichtian planispiral planktonic foraminifera traditionally assigned to Globigerinelloides. Micropaleontology. 68(2): 117-183. gs Pessagno, E. A. (1967). Upper Cretaceous planktonic foraminifera from the western Gulf Coastal Plain. Palaeontographica Americana. 5: 245-445. gs O Smith, C. C. & Pessagno, E. A. (1973). Planktonic foraminifera and stratigraphy of the Corsicana formation (Maestrichtian) North-central Texas. Cushman Foundation for Foraminiferal Research, Special Publication. 12: 1-67. gs OReferences:
Planohedbergella prairiehillensis compiled by the pforams@mikrotax project team viewed: 10-12-2024
Short stable page link: https://mikrotax.org/pforams/index.php?id=110143 Go to Archive.is to create a permanent copy of this page - citation notes |
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