pforams@mikrotax - Planohedbergella multispina

Planohedbergella multispina


Classification: pf_mesozoic -> Globigerinelloididae -> Planohedbergella -> Planohedbergella multispina
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 multispina (Lalicker, 1948)
Rank: species
Basionym: Biglobigerinella multispina Lalicker 1948
Synonyms:

Type images:

Original description: Test planispiral, involute, trochoid in the earliest chambers, especially in the microspheric form; chambers in the early stages globular, in the adult stage the last-formed chambers are flattened and the last one is divided into 2 globular chambers, one on each side of the plane of coiling; sutures distinct, depressed; wall calcareous, perforate, with tiny spines on the surface; aperture consisting of a low arch at the base of the last chambers, and quite indistinct.

Entries in the Catalog of original descriptions: Biglobigerinella multispina, Globigerinella biforaminata


Emended description:


Morphology:

Wall type:

Size:

Character matrix
test outline:Subcircularchamber arrangement:Planispiraledge view:Hourglassaperture:Equatorial
sp chamber shape:N/Acoiling axis:N/Aperiphery:N/Aaperture border:Thick lip
umb chbr shape:Inflatedumbilicus:Narrowperiph margin shape:Moderately roundedaccessory apertures:None
spiral sutures:N/Aumb depth:Deepwall texture:Finely muricateshell porosity:Finely Perforate: 1-2.5µm
umbilical or test sutures:Moderately depressedfinal-whorl chambers:5.0-6.0 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.

Geological Range:
Last occurrence (top): within Maastrichtian Stage (66.04-72.05Ma, top in Maastrichtian stage). Data source: [copied from Chronos database]
First occurrence (base): within C. plummerae zone (76.18-79.20Ma, base in Campanian stage). Data source: Huber et al. 2022

Plot of range and occurrence data:

References:

Lalicker, C. G. (1948). A new genus of Foraminifera from the Upper Cretaceous. Journal of Paleontology. 22: 624-. gs

Pessagno, E. A. (1967). Upper Cretaceous planktonic foraminifera from the western Gulf Coastal Plain. Palaeontographica Americana. 5: 245-445. gs V 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 V O


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Planohedbergella multispina compiled by the pforams@mikrotax project team viewed: 5-12-2022

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Short stable page link: https://mikrotax.org/pforams/index.php?id=110140 Go to Archive.is to create a permanent copy of this page - citation notes



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