Planohedbergella subcarinata
Classification: pf_mesozoic -> Globigerinelloididae -> Planohedbergella -> Planohedbergella subcarinata
Sister taxa: P. aspera, P. circularis, P. escheri, P. impensa, P. messinae, P. multispina, P. prairiehillensis, P. subcarinata, P. ultramicra, P. yaucoensis
Pessagno 1967 pl62 12-13.JPG
Huber et al 2022 Micro 17 02.jpg
Huber et al 2022 Micro 17 03.jpg
Huber et al 2022 Micro 17 04.jpg
Huber et al 2022 Micro 17 05.jpg
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Huber et al 2022 Micro 17 11.jpg
Huber et al 2022 Micro 17 12.jpg
Huber et al 2022 Micro 17 13.jpg
Huber et al 2022 Micro 17 14.jpg
Huber et al 2022a CR 17 15.jpg
Smith and Pessagno 1973_16f10f12-60.JPG
DSDP Site 463-459-60.JPG
Taxonomy
holotype: G. messinae subcarinata
holotype: G. messinae subcarinata_USNM370091_holo.jpg)
holotype: G. messinae subcarinata
_USNM370091_holo.jpg)
Original description: The small, compressed and planispiral test has a lobate outline. The adult volution is composed of 5, rarely 6, much-compressed, subcarinate chambers. The last whorl is semi-involute, exposing in the shallow umbilici parts of the earlier chambers. The chambers are separated by rather deep and straight sutures. The end chamber is occasionally not larger or even smaller than the penultimate one. The outline of the individual chambers is elongate-ellipsoid in apertural and subcircular in lateral view. Early ontogenetic chambers are rounded peripherally, similar to those of the subspecies Globigerinella messinae subsp. messinae Bronnimann. The large arcuate aperture is situated equatorially at the base of the end chamber and is provided with a delicate, indistinct lip-like projection. The walls appear to be thin and finely perforate. Minute papillae are evenly distributed over the surface. The ornamentation is stronger in the early stage of the last volution."
Entries in the Catalog of original descriptions: Globigerinella messinae subcarinata
Character matrix
| test outline: | Quadrate | chamber arrangement: | Planispiral | edge view: | Compressed | aperture: | Equatorial |
| sp chamber shape: | N/A | coiling axis: | N/A | periphery: | - | aperture border: | Thin lip |
| umb chbr shape: | Petaloid | umbilicus: | Wide | periph margin shape: | Subangular | accessory apertures: | None |
| spiral sutures: | N/A | umb depth: | Shallow | wall texture: | Smooth | shell porosity: | Finely Perforate: 1-2.5µm |
| umbilical or test sutures: | Moderately depressed | final-whorl chambers: | 4.5-5.5 | N.B. These characters are used for advanced search. N/A - not applicable | |||
Most likely ancestor:
Planohedbergella messinae - at confidence level 3 (out of 5). Data source: Huber et al. 2022 fig. 2.
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. asymetrica zone (83.65-85.60Ma, base in Santonian stage). Data source: Huber et al 2022
Plot of range and occurrence data:
- Range-bar - range as quoted above, pink interval top occurs in, green interval base occurs in.
- Triangles indicate an event for which a precise placement has been suggested
- Histogram - Neptune occurrence data from DSDP and ODP proceedings. Pale shading <50 samples in time bin. Interpret with caution & read these notes
- Taxon plotted: Planohedbergella subcarinata, synonyms included - Globigerinelloides subcarinatus; Globotruncanella subcarinatus;
- See also space-time plot :: Samples map :: Parent: Planohedbergella
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 Brönnimann, P. (1952c). Globigerinidae from the Upper Cretaceous (Cenomanian-Maestrichtian) of Trinidad, B. W. I. Bulletins of American Paleontology. 34(140): 1-70. gs 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 Huber, B. T., Tur, N., Self-Trail, J. & MacLeod, K. G. (2022a). Calcareous plankton biostratigraphic fidelity and species richness during the last 10 m.y. of the Cretaceous at Blake Plateau, subtropical North Atlantic. Cretaceous Research. 131: 1-42. gs Pessagno, E. A. (1967). Upper Cretaceous planktonic foraminifera from the western Gulf Coastal Plain. Palaeontographica Americana. 5: 245-445. gs O Missing or ambiguous references: ; References:
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Planohedbergella subcarinata compiled by the pforams@mikrotax project team viewed: 17-12-2025
Short stable page link: https://mikrotax.org/pforams/index.php?id=110147 Go to Archive.is to create a permanent copy of this page - citation notes |
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