Taxonomy
Original description: Test transparent, calcareous, smooth, strongly compressed, elongate-rounded on the wide side and more or less lobate. Five to six arched chambers surround the first central chamber, which appears five or size-sided, dark, and of variable size. The last and, at times, the second last chambers are often distinctly inflated producing deep incisions between the chambers. Aperture is not visible. Structure is equally equal-sided.
Entries in the Catalog of original descriptions: Nonionina escheri, Globigerinella aissana, Hastigerina aspera digitata, Planomalina mendezensis, Globigerinelloides praevolutus
Emended description:
Morphology:
Wall type:
Size:
Most likely ancestor: Planohedbergella aspera - at confidence level 3 (out of 5). Data source: Huber et al. 2022 fig. 2.
Likely descendants: Planohedbergella messinae;
plot with descendants
Geological Range:
Last occurrence (top): within R. calcarata zone (75.71-76.18Ma, top in Campanian stage). Data source: Huber et al 2022
First occurrence (base): within D. concavata zone (86.71-89.91Ma, base in Turonian stage). Data source: Huber et al 2022
Plot of range and occurrence data:
Character matrix
test outline: | Lobate | chamber arrangement: | Planispiral | edge view: | Hourglass | aperture: | Equatorial |
sp chamber shape: | Globular | coiling axis: | N/A | periphery: | N/A | aperture border: | Thin lip |
umb chbr shape: | Globular | umbilicus: | N/A | periph margin shape: | Broadly rounded | accessory apertures: | Relict |
spiral sutures: | N/A | umb depth: | N/A | wall texture: | Finely pustulose | shell porosity: | Microperforate: <1µm |
umbilical or test sutures: | Moderately depressed | final-whorl chambers: | 4.5-6.0 | N.B. These characters are used for advanced search. N/A - not applicable |
Georgescu, M. D. & Huber, B. T. (2008). Taxonomic re-evaluation and phylogeny of the stellate planktonic foraminiferal genus Hastigerinoides Brönnimann, 1952. Journal of Foraminiferal Research. 38: 52-58. gs Huber, B. T., Petrizzo, M. M. & Falzoni, F. (2022). Taxonomy and phylogeny of Albian–Maastrichtian planispiral planktonic foraminifera traditionally assigned to Globigerinelloides. Micropaleontology. 68(2): 117-183. gs Kaufmann, F. J. (1865). Die Zeit der kreidebildung: Die Polythalamien des Seewerfaltes, des Gault und Schrattefaltes. In, Heer, O. (ed.) Die Urwelt der Schweiz. F. Schulthess, Zurich 1-198. gsReferences:
![]() |
Planohedbergella escheri compiled by the pforams@mikrotax project team viewed: 29-5-2022
Short stable page link: https://mikrotax.org/pforams/index.php?id=110132 Go to Archive.is to create a permanent copy of this page - citation notes |
Comments
(0)