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Clavihedbergella simplicissima


Classification: pf_mesozoic -> Hedbergellidae -> Clavihedbergella -> Clavihedbergella simplicissima
Sister taxa: C. amabilis, C. eocretacea, C. leckiei, C. moremani, C. moulladei, C. pauliani, C. simplex, C. simplicissima, C. subcretacea, C. subdigitata, C. sp.,

Taxonomy

Citation: Clavihedbergella simplicissima (Magne and Sigal, 1954)
Rank: Species
Basionym: Hastigerinella simplicissima

Type images:

Original description: Hastigerinella simplicissima Magne and Sigal 1954: Translated from French. "Diagnosis. - A species characterized by a slight elongation of the chambers, indeed placing this form between two genera, Globigerina and Hastigerinella. "Description: - Test with a globigerinid mode of coiling. The chambers, numbering 5 in the last whorl, are strongly inflated, not compressed and slightly elongate in a radial direction; they are often shifted with regard to a plane perpendicular to the coiling axis. The aperture is protected by an umbilical lip.

Entries in the Catalog of original descriptions: Hastigerinella simplicissima;

Geological Range:
Last occurrence (top): within Cenomanian Stage (93.90-100.50Ma, top in Cenomanian stage). Data source: [copied from Chronos database]
First occurrence (base): within Cenomanian Stage (93.90-100.50Ma, base in Cenomanian 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:Strongly lobatechamber arrangement:Trochospiraledge view:aperture:Umb.-extraumbilical
umb chamber shape:Elongatecoiling axis:Lowperiphery:N/Aaperture border:Thin lip
sp chbr shape:Elongateumbilicus:Narrowperiph margin shape:Moderately roundedaccessory apertures:Relict
umbilical or test sutures:Strongly depressedumb depth:Shallowwall texture:Finely pustuloseshell porosity:
spiral sutures:Strongly depresseddiameter mm:0.32width mm:breadth mm:0.12
final-whorl chambers:4.5-5.5

References:

Magne, J. & Sigal, J., (1954). Description des especes nouvelles; 1 - Foraminiferes. In: Cheylan, G. et al. (Editors), Resultats geologiques et micropaleontologiques du sondage d' El Krachem (Hauts Plateaux algerois). . Bulletin de la Societe Geologique de France, ser. 6, pp. 471-492.


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Clavihedbergella simplicissima compiled by the pforams@mikrotax project team viewed: 16-12-2017

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