nmn

Blefuscuiana laculata


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

Taxonomy

Citation: Blefuscuiana laculata Banner, Copestake, & White, 1993
Rank: Species
Basionym: Blefuscuiana laculata Banner, Copestake, & White, 1993
Synonyms:

Type images:

Original description: Blefuscuiana laculata subsp. laculata Banner, Copestake, & White 1993: Blefuscuiana laculata (sensu stricto).
Diagnosis. Characterised by having a roughly quadrangular test outline, an open umbilicus, and intercameral sutures at the periphery of the test which form angles of about 120-135 degrees; the test surface lacks perforation cones.

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

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:Subquadratechamber arrangement:Trochospiraledge view:Concavo-convexaperture:-
umb chamber shape:-coiling axis:Lowperiphery:-aperture border:-
sp chbr shape:Globularumbilicus:-periph margin shape:-accessory apertures:-
umbilical or test sutures:Moderately depressedumb depth:-wall texture:-shell porosity:-
spiral sutures:Moderately depresseddiameter mm:0.15-0.20width mm:breadth mm:
final-whorl chambers:4.5-5.5

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.


logo

Blefuscuiana laculata compiled by the pforams@mikrotax project team viewed: 16-12-2017

Taxon Search:
Advanced Search

Go to Archive.is to create a permanent copy of this page - citation notes



Comments (0)

No comments yet. Be the first!

Add Comment

* Required information
1000
Captcha Image
Powered by Commentics