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Globigerinelloides asper


Classification: pf_mesozoic -> Globigerinelloididae -> Globigerinelloides -> Globigerinelloides asper
Sister taxa: G. algerianus, G. alvarezi, G. aptiensis, G. asper, G. barri, G. bentonensis, G. blowi, G. bollii, G. clavatus, G. duboisi, G. ehrenbergi, G. elongatus, G. escheri, G. ferreolensis, G. gottisi, G. impensus, G. lobatus, G. maridalensis, G. mendezensis, G. messinae, G. multispinus, G. paragottisi, G. praevolutus, G. prairiehillensis, G. pulchellus, G. sigali, G. subcarinatus, G. ultramicrus, G. yaucoensis, G. sp.,

Taxonomy

Citation: Globigerinelloides asper (Ehrenberg, 1854)
Rank: Species
Basionym: Phanerostomum asper
Synonyms:
Variants:
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 Ehrenberg 1854: Not given.

Entries in the Catalog of original descriptions: Globigerina voluta;
Globigerinella abberanta [not in catalog yet]Globigerinella japonica;
Globigerinella messinae messinae;
Phanerostomum asperum;
Planomalina mauryae;
Planomalina rowei;


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]

Geological Range:
Last occurrence (top): within A. mayaroensis zone (67.30-69.18Ma, top in Maastrichtian stage). Data source: [copied from Chronos database]
First occurrence (base): within D. concavata zone (86.71-89.91Ma, base in Turonian stage). Data source: [copied from Chronos database]

Plot of occurrence data:

NB Plotting of Neptune data has been disabled on the Mesozoic pages because the dataset is both small and badly affected by a few sites with erroneous age models (our obs Huber, Petrizzo, Young, Nov 2016). The data can still be viewed via the range plottertool - tools menu.

Character matrix

test outline:Lobatechamber arrangement:Planispiraledge view:Hourglassaperture:Equatorial
umb chamber shape:Globularcoiling axis:Very lowperiphery:N/Aaperture border:Thick lip
sp chbr shape:Globularumbilicus:Narrowperiph margin shape:Moderately roundedaccessory apertures:Relict
umbilical or test sutures:Moderately depressedumb depth:Shallowwall texture:Finely pustuloseshell porosity:-
spiral sutures:Moderately depresseddiameter mm:0.22width mm:breadth mm:0.1
final-whorl chambers:4.5-5.5

References:

Brönnimann, P., (1952). Globigerinidae from the Upper Cretaceous (Cenomanian-Maestrichtian) of Trinidad, B. W. I. Bulletin of American Paleontology, 34(140): 1-70.

Ehrenberg, C.G., (1854). Mikrogeologie. L. Voss, Leipzig, 1-374 pp.

Masters 1977 [sorry, not in our bibliography yet]

Pessagno, E.A., Jr., (1967). Upper Cretaceous planktonic foraminifera from the western Gulf Coastal Plain. Palaeontograph. Americana, 5: 245-445.


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Globigerinelloides asper compiled by the pforams@mikrotax project team viewed: 23-11-2017

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