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Blefuscuiana alobata


Classification: pf_mesozoic -> Praehedbergellidae -> Blefuscuiana -> Blefuscuiana alobata
Sister taxa: B. alobata, B. cumulus, B. daminiae, B. depressa, B. implana, B. laculata, B. sp.,

Taxonomy

Citation: Blefuscuiana alobata (Banner, Copestake & White, 1993)
Rank: Species
Basionym: Blefuscuiana laculata alobata alobata

Type images:

Original description: Blefuscuiana laculata alobata alobata Banner, Copestake & White 1993: Diagnosis. - A subspecies of Blefuscuiana laculata Banner, Copestake and White, 1993, characterised by having intercameral sutural angles at the periphery of about 130-145 degrees; the test surface lacks perforation cones.

Entries in the Catalog of original descriptions: Blefuscuiana laculata alobata alobata;

Geological Range:
Last occurrence (top): within Barremian Stage (126.30-130.77Ma, top in Barremian stage). Data source: [copied from Chronos database]
First occurrence (base): within Barremian Stage (126.30-130.77Ma, base in Barremian 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:coiling axis:Very lowchamber arrangement:Pseudoplanispiralumbilicus:
edge view:umbilical or test sutures:Moderately depressedspiral sutures:Moderately depressedshell porosity:
wall texture:aperture:aperture border:accessory apertures:
periphery:umb chamber shape:sp chbr shape:periph margin shape:
umb depth:diameter mm:width mm:breadth mm:
final-whorl chambers:4.0-4.5

References:

Banner, F.T.; Copestake, P. & White, M.R., (1993). Barremian-Aptian Praehedbergellidae of the North Sea area: a reconnaisance. Bulletin of the Natural History Museum, London (Geology), 49: 1-30.


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Blefuscuiana alobata compiled by the pforams@mikrotax project team viewed: 22-7-2017

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