Taxonomy
Original description: 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
Character matrix
test outline: | - | chamber arrangement: | Pseudoplanispiral | edge view: | - | aperture: | - |
sp chamber shape: | - | coiling axis: | Very low | periphery: | - | aperture border: | - |
umb chbr shape: | - | umbilicus: | - | periph margin shape: | - | accessory apertures: | - |
spiral sutures: | Moderately depressed | umb depth: | - | wall texture: | - | shell porosity: | - |
umbilical or test sutures: | Moderately depressed | final-whorl chambers: | 4-4.5 | N.B. These characters are used for advanced search. N/A - not applicable |
Geological Range:
Last occurrence (top): within Barremian Stage (121.40-126.50Ma, top in Barremian stage). Data source: [copied from Chronos database]
First occurrence (base): within Barremian Stage (121.40-126.50Ma, base in Barremian stage). Data source: [copied from Chronos database]
Plot of range and occurrence data:
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. gsReferences:
Blefuscuiana alobata compiled by the pforams@mikrotax project team viewed: 19-9-2024
Short stable page link: https://mikrotax.org/pforams/index.php?id=110025 Go to Archive.is to create a permanent copy of this page - citation notes |
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