pforams@mikrotax - Planohedbergella aspera pforams@mikrotax - Planohedbergella aspera

Planohedbergella aspera

Classification: pf_mesozoic -> Globigerinelloididae -> Planohedbergella -> Planohedbergella aspera
Sister taxa: P. aspera, P. circularis, P. escheri, P. impensa, P. messinae, P. multispina, P. prairiehillensis, P. subcarinata, P. ultramicra, P. yaucoensis


Citation: Planohedbergella aspera (Ehrenberg, 1854)
taxonomic rank: species
Basionym: Phanerostomum asper Ehrenberg, 1854
Taxonomic discussion: Bronnimann (1952) says this taxon should not be used owing to its confused taxonomy; original illustrations and description of this species are inadequate. But Pessagno (1967) designated a lectotype and Masters (1977) illustrated topotypes. Occasionally biapertural. [copied from Chronos database]

Type images:

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:

Pessagno, 1967, p. 274-275: "Test small, hispid, planispiral consisting of two whorls ; six chambers in the last whorl. Chambers expanding moderately rapidly in size as added. Aperture interiomarginal, equatorial in position, a highly arched rounded opening bordered by a thick lop. Outer wall radial hyaline perforate; septal wall microgranular hyaline, perforate. [copied from Chronos database]

Character matrix
test outline:Lobatechamber arrangement:Planispiraledge view:Hourglassaperture:Equatorial
sp chamber shape:Globularcoiling axis:Very lowperiphery:N/Aaperture border:Thick lip
umb chbr shape:Globularumbilicus:Narrowperiph margin shape:Moderately roundedaccessory apertures:Relict
spiral sutures:Moderately depressedumb depth:Shallowwall texture:Finely pustuloseshell porosity:-
umbilical or test sutures:Moderately depressedfinal-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;


Planohedbergella aspera compiled by the pforams@mikrotax project team viewed: 14-6-2024

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