pforams@mikrotax - Globigerinelloides blowi pforams@mikrotax - Globigerinelloides blowi

Globigerinelloides blowi


Classification: pf_mesozoic -> Globigerinelloididae -> Globigerinelloides -> Globigerinelloides blowi
Sister taxa: G. clavatus, G. gyroidinaeformis ⟩⟨ G. algerianus, G. aptiensis, G. barri, G. ferreolensis ⟩⟨ G. blowi, G. duboisi, G. maridalensis, G. paragottisi ⟩⟨ G. elongatus, G. lobatus, G. sigali, G. sp.

Taxonomy

Citation: Globigerinelloides blowi (Bolli, 1959)
taxonomic rank: Species
Basionym: Planomalina blowi
Synonyms:
Taxonomic discussion: Globigerinelloides blowi displays a relatively wide morphological variability mainly regarding (1) the number of chambers of the outer whorl ranging from 4.5 to 6 (usually 5 to 5.5), (2) their shape from spherical to slightly reniform in lateral view, (3) the more or less slightly lobate equatorial periphery, and (4) the more or less depressed and wide umbilical area. [copied from Chronos database]

Type images:

Original description: Shape of test planispiral, biumbilicate, involute, distinctly lobate. Wall calcareous, finely perforate. Chambers spherical, 4-5 in the last whorl, increasing rapidly in size; those of the earlier whorls usually not visible. Sutures radial, deeply depressed. Aperture a long, low slit, bordered by a rim or lip; equatorial. Relict apertures of earlier chambers of last whorl present but often not clearly visible in examined material.

Entries in the Catalog of original descriptions: Planomalina blowi, Globigerinelloides texomaensis, Globigerinella gottisi

Character matrix
test outline:Lobatechamber arrangement:Planispiraledge view:-aperture:Equatorial
sp chamber shape:Globularcoiling axis:N/Aperiphery:N/Aaperture border:Thin lip
umb chbr shape:Globularumbilicus:Narrowperiph margin shape:Broadly roundedaccessory apertures:Relict
spiral sutures:Strongly depressedumb depth:Deepwall texture:Finely pustuloseshell porosity:-
umbilical or test sutures:Strongly depressedfinal-whorl chambers:4-5 N.B. These characters are used for advanced search. N/A - not applicable

Geological Range:
Last occurrence (top): within G. algerianus zone (116.86-118.24Ma, top in Aptian stage). Data source: [copied from Chronos database]
First occurrence (base): at base of G. blowi zone (0% up, 124.4Ma, in Barremian stage). Data source: zonal marker (from Timescale Creator)

Plot of range and occurrence data:

References:

Bolli, H. M. (1959c). Planktonic foraminifera from the Cretaceous of Trinidad, B. W. I. Bulletins of American Paleontology. 39(179): 253-277. gs

Chevalier, J. (1961). Quelques nouvelles espèces de Foraminifères dans le Crétacé inférieur méditerranéen. Revue de Micropaléontologie. 4(1): 30-36. gs

Lipson-Benitah, S. & Almogi-Labin, A. (2004). Aptian planktonic foraminifera from Israel. Israel Journal of Earth Sciences. 53(1): 27-46. gs

Verga, D. & Premoli Silva, I. (2003b). Early Cretaceous planktonic foraminifera from the Tethys: The small few-chambered representatives of the genus Globigerinelloides. Cretaceous Research. 24: 305-334. gs


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Globigerinelloides blowi compiled by the pforams@mikrotax project team viewed: 18-7-2024

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