Taxonomy
Original description: Phanerostomum asperum, Schreibkreide des Mississippi-Gebietes, Nord-Amerika, T. XXXII. ii. F.42.; Schreibkreide des Missouri-Gebietes, Nord-Amerika, T. XXXII. i. F. 24.; Schreibkreide von der Insel Rügen, Pommern, T. XXX. F. 26. a. b. [text listing on p 23 of the atlas]
Entries in the Catalog of original descriptions: Phanerostomum asperum, Globigerinella aberranta, Globigerinella japonica, Planomalina mauryae, Globigerina voluta, Globigerinella biforaminata
Emended description:
Character matrix
test outline: | Lobate | chamber arrangement: | Planispiral | edge view: | Hourglass | aperture: | Equatorial |
sp chamber shape: | Globular | coiling axis: | Very low | periphery: | N/A | aperture border: | Thick lip |
umb chbr shape: | Globular | umbilicus: | Narrow | periph margin shape: | Moderately rounded | accessory apertures: | Relict |
spiral sutures: | Moderately depressed | umb depth: | Shallow | wall texture: | Finely pustulose | shell porosity: | - |
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 ultramicra - at confidence level 3 (out of 5). Data source: Huber et al. 2022 fig. 2.
Likely descendants: Planohedbergella escheri; Planohedbergella multispina; Planohedbergella prairiehillensis;
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:
Brönnimann, P. (1952c). Globigerinidae from the Upper Cretaceous (Cenomanian-Maestrichtian) of Trinidad, B. W. I. Bulletins of American Paleontology. 34(140): 1-70. gs Ehrenberg, C. G. (1854). Mikrogeologie: Das Erden und Felsen schaffende Wirken des unsichtbar kleinen selbständigen Lebens auf der Erde. Leopold Voss, Leipzig. 1-374. 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: Masters 1977; References:
Planohedbergella aspera compiled by the pforams@mikrotax project team viewed: 10-12-2024
Short stable page link: https://mikrotax.org/pforams/index.php?id=110120 Go to Archive.is to create a permanent copy of this page - citation notes |
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