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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. saundersi, G. sigali, G. subcarinatus, G. ultramicrus, G. sp.,

Taxonomy

Citation: Globigerinelloides asper (Ehrenberg, 1854)
Rank: Species
Basionym: Phanerostomum asper
Synonyms: Globigerinella abberanta; Globigerinella japonica; Planomalina mauryae; Planomalina rowei
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 asper Ehrenberg 1854: Not given.

Entries in the Catalog of original descriptions: Globigerinella abberanta;
Globigerinella japonica;
Phanerostomum asper;
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:Lobatecoiling axis:Very lowchamber arrangement:Planispiralumbilicus:Narrow
edge view:Hourglassumbilical or test sutures:Moderately depressedspiral sutures:Moderately depressedshell porosity:
wall texture:Finely pustuloseaperture:Equatorialaperture border:Thick lipaccessory apertures:Relict
periphery:N/Aumb chamber shape:Globularsp chbr shape:Globularperiph margin shape:Moderately rounded
umb depth:Shallowdiameter mm:0.22width mm:breadth mm:0.1
final-whorl chambers:4.5-5.5

References:

Ehrenberg 1854 [sorry, not in our bibliography yet]


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Globigerinelloides asper compiled by the pforams@mikrotax project team viewed: 22-7-2017

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