arrayname: original
Taxonomy
Original description: Wall with dense pustules, irregularly distributed and more developed on the earliest chambers of the last whorl, last chamber smooth. Test low trochospiral, biconvex, equatorial periphery lobate, peripheral margin rounded, perforate and marked by pustules irregularly scattered on the first chambers of the last whorl. Chambers inflated, 6, rarely 7 in final whorl, uniformly and slowly increasing in size, triangular on the umbilical side, circular on the spiral side; sutures depressed and straight on both sides; umbilicus moderately narrow; primary aperture umbilical-extraumbilical, bordered by a thin lip.
Entries in the Catalog of original descriptions: Hedbergella blakensis
Character matrix
test outline: | Lobate | chamber arrangement: | Trochospiral | edge view: | aperture: | ||
sp chamber shape: | coiling axis: | Low | periphery: | N/A | aperture border: | ||
umb chbr shape: | umbilicus: | periph margin shape: | Moderately rounded | accessory apertures: | |||
spiral sutures: | umb depth: | wall texture: | Coarsely pustulose | shell porosity: | |||
umbilical or test sutures: | Moderately depressed | final-whorl chambers: | 6-7 | N.B. These characters are used for advanced search. N/A - not applicable |
Geological Range:
Last occurrence (top): within P. appenninica zone (100.50-101.92Ma, top in Albian stage). Data source: [copied from Chronos database]
First occurrence (base): within P. appenninica zone (100.50-101.92Ma, base in Albian stage). Data source: [copied from Chronos database]
Plot of range and occurrence data:
Petrizzo, M. R. & Huber, B. T. (2006). Biostratigraphy and taxonomy of late Albian planktonic foraminifera from ODP Leg 171B (western North Atlantic Ocean). Journal of Foraminiferal Research. 36: 166-190. gsReferences:
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Muricohedbergella blakensis compiled by the pforams@mikrotax project team viewed: 22-4-2025
Short stable page link: https://mikrotax.org/pforams/index.php?id=110362 Go to Archive.is to create a permanent copy of this page - citation notes |
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