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Asterohedbergella asterospinosa


Classification: pf_mesozoic -> Hedbergellidae -> Asterohedbergella -> Asterohedbergella asterospinosa
Sister taxa: A. asterospinosa,

Taxonomy

Citation: Asterohedbergella asterospinosa (Hamaoui, 1965)
Rank: Species
Basionym: Hedbergella asterospinosa
Taxonomic discussion: Figure 1 to 3 holotype [copied from Chronos database]

Type images:

Original description: Hedbergella asterospinosa Hamaoui 1965: Text small, concavo-convex, 4 to 6 chambers on the last whorl. Peripheral outline lobate, petaloid to star-shaped, axial periphery subangular to acute. The pointed extention of the chambers are usually tubulospinate. Wall texture generally recrystallized in granular calcite.

Entries in the Catalog of original descriptions: Hedbergella asterospinosa;

Geological Range:
Last occurrence (top): within R. cushmani zone (94.03-95.94Ma, 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:Stellatecoiling axis:Lowchamber arrangement:Trochospiralumbilicus:Narrow
edge view:Concavo-convexumbilical or test sutures:Weakly depressedspiral sutures:Weakly depressedshell porosity:Microperforate: <1
wall texture:Encrustedaperture:Umb.-extraumbilicalaperture border:Thin lipaccessory apertures:None
periphery:umb chamber shape:Trapezoidalsp chbr shape:Trapezoidalperiph margin shape:Subangular
umb depth:Shallowdiameter mm:0.11-0.20 mmwidth mm:breadth mm:0.075 mm
final-whorl chambers:4.0-6.0

References:

Hamaoui, M., (1965). On a new subgenus of Hedbergella (Foraminiferida. . Israel Journal of Earth Sciences, 13(3-4): 133-142.


Asterohedbergella asterospinosa compiled by the pforams@mikrotax project team viewed: 29-5-2017

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