pforams@mikrotax - Planohedbergella prairiehillensis pforams@mikrotax - Planohedbergella prairiehillensis

Planohedbergella prairiehillensis


Classification: pf_mesozoic -> Globigerinelloididae -> Planohedbergella -> Planohedbergella prairiehillensis
Sister taxa: P. aspera, P. circularis, P. escheri, P. impensa, P. messinae, P. multispina, P. prairiehillensis, P. subcarinata, P. ultramicra, P. yaucoensis

Taxonomy

Citation: Planohedbergella prairiehillensis Pessagno 1967
taxonomic rank: species
Basionym: Globigerinelloides prairiehillensis
Synonyms:

Type images:

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:Ovatechamber arrangement:Planispiraledge view:Hourglassaperture:Equatorial
sp chamber shape:N/Acoiling axis:N/Aperiphery:N/Aaperture border:Thin lip
umb chbr shape:Inflatedumbilicus:Wideperiph margin shape:Moderately roundedaccessory apertures:Relict
spiral sutures:N/Aumb depth:Deepwall texture:Finely muricateshell porosity:Finely Perforate: 1-2.5µm
umbilical or test sutures:Moderately depressedfinal-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:

References:

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 O


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Planohedbergella prairiehillensis compiled by the pforams@mikrotax project team viewed: 21-2-2024

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