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Microhedbergella intermedia


Classification: pf_mesozoic -> Hedbergellidae -> Microhedbergella -> Microhedbergella intermedia
Sister taxa: M. albiana, M. intermedia, M. miniglobularis, M. praeplanispira, M. pseudodelrioensis, M. pseudoplanispira, M. pseudotrocoidea, M. renilaevis, M. rischi, M. sp.,

Taxonomy

Citation: Microhedbergella intermedia (Michael, 1973)
Rank: Species
Basionym: Hedbergella intermedia

Type images:

Original description: Test small to medium; pores large relative to size of test, widely separated and evenly distributed over test surface; coiling relatively compact; chambers subglobular to subspherical; increasing gradually in size as added and arranged in a low trochospire of about two and one half volutions; usually six chambers in the last whorl; final chamber offset toward umbilicus; sutures distinct, deep radial and straight; umbilicus small; primary aperture interiomarginal, umbilical to extraumbilical, portici small, sounded, spatulate, rarely preserved."

Entries in the Catalog of original descriptions: Hedbergella intermedia

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. ticinensis zone (101.92-103.94Ma, base in Albian stage). Data source: [copied from Chronos database]

Plot of occurrence data:

Dec 2017 - Plotting of Neptune data has been re-enabled on the Mesozoic pages following revision of the age-models in Neptune. The data is, however, still very sparse for the Early Cretaceous

Character matrix

test outline:Circularchamber arrangement:Trochospiraledge view:aperture:
sp chamber shape:coiling axis:Low-moderateperiphery:aperture border:
umb chbr shape:umbilicus:periph margin shape:Moderately roundedaccessory apertures:
spiral sutures:umb depth:wall texture:shell porosity:Macroperforate: >2.5┬Ám
umbilical or test sutures:Moderately depressedfinal-whorl chambers:0.0-0.0 N.B. These characters are used for advanced search. N/A - not applicable

References:

Michael, F. Y. (1973). Planktonic foraminifera from the Comanchean Series (Cretaceous) of Texas. Journal of Foraminiferal Research. 2 (1972)(4): 200-220. gs


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Microhedbergella intermedia compiled by the pforams@mikrotax project team viewed: 29-9-2020

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Short stable page link: http://mikrotax.org/pforams/index.php?id=110348 Go to Archive.is to create a permanent copy of this page - citation notes



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