Taxonomy
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, Biglobigerinella algeriana
Character matrix
test outline: | Subcircular | chamber arrangement: | Planispiral | edge view: | Hourglass | aperture: | Equatorial |
sp chamber shape: | N/A | coiling axis: | N/A | periphery: | N/A | aperture border: | Thick lip |
umb chbr shape: | Inflated | umbilicus: | Narrow | periph margin shape: | Moderately rounded | accessory apertures: | None |
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: | 5-6 | 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 (66.04-72.17Ma, top in Maastrichtian stage). Data source: [copied from Chronos database]
First occurrence (base): within C. plummerae zone (75.91-79.33Ma, base in Campanian 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 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 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 ten Dam, A. & Sigal, J. (1949). Sur une espèce nouvelle du genre de Foraminifères Biglobigerinella Lalicker, 1948. Compte Rendu Sommaire des Séances de la Société Géologique de France. 11: 234-235. gsReferences:
Planohedbergella multispina compiled by the pforams@mikrotax project team viewed: 14-9-2024
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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