pforams@mikrotax - Muricohedbergella crassa pforams@mikrotax - Muricohedbergella crassa

Muricohedbergella crassa


Classification: pf_mesozoic -> Hedbergellidae -> Muricohedbergella -> Muricohedbergella crassa
Sister taxa: M. almadenensis, M. angolae, M. astrepta, M. atlantica, M. blakensis, M. crassa, M. delrioensis, M. flandrini, M. hoelzli, M. holmdelensis, M. implicata, M. kyphoma, M. loetterli, M. monmouthensis, M. planispira, M. portsdownensis, M. praelibyca, M. rosebudensis, M. sliteri, M. wondersi, M. sp.

Taxonomy

Citation: Muricohedbergella crassa (Bolli, 1959)
Taxonomic rank: species
Basionym: Praeglobotruncana crassa

Type images:

Original description: Shape of test low trochospiral, equatorial periphery lobate. Wall calcareous, finely perforate. Chambers spherical in early stage, becoming slightly compressed laterally in the final whorl, giving the test a thick appearance. Approximately 15 chambers arranged in about 3 whorls. The 5 chambers of the last whorl increase moderately in size. Sutures radial, depressed on spiral and umbilical side. Umbilicus narrow, deep. Aperture a low arch, interiomarginal, umbilical-extraumbilical. Coiling random.

Entries in the Catalog of original descriptions: Praeglobotruncana crassa

Character matrix
test outline:Lobatechamber arrangement:Trochospiraledge view:Planoconvexaperture:Umbilical-extraumbilical
sp chamber shape:Inflatedcoiling axis:Very lowperiphery:N/Aaperture border:Thin lip
umb chbr shape:Inflatedumbilicus:Narrowperiph margin shape:Broadly roundedaccessory apertures:Relict
spiral sutures:Moderately depressedumb depth:Shallowwall texture:Smoothshell porosity:
umbilical or test sutures:Moderately depressedfinal-whorl chambers:5-6 N.B. These characters are used for advanced search. N/A - not applicable

Geological Range:
Last occurrence (top): within D. concavata zone (85.60-89.75Ma, top in Santonian stage). Data source: [copied from Chronos database]
First occurrence (base): within H. helvetica zone (92.51-93.52Ma, base in Turonian stage). Data source: [copied from Chronos database]

Plot of range and occurrence data:

References:

Bolli, H. M. (1959c). Planktonic foraminifera from the Cretaceous of Trinidad, B. W. I. Bulletins of American Paleontology. 39(179): 253-277. gs


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Muricohedbergella crassa compiled by the pforams@mikrotax project team viewed: 10-9-2026

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Short stable page link: https://mikrotax.org/pforams/index.php?id=110363 Go to Archive.is to create a permanent copy of this page - citation notes



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