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Clavihedbergella moremani


Classification: pf_mesozoic -> Hedbergellidae -> Clavihedbergella -> Clavihedbergella moremani
Sister taxa: C. amabilis, C. eocretacea, C. leckiei, C. moremani, C. moulladei, C. pauliani, C. simplex, C. simplicissima, C. subcretacea, C. subdigitata, C. sp.,

Taxonomy

Citation: Clavihedbergella moremani (Cushman, 1931)
Rank: Species
Basionym: Hastigerinella moremani

Type images:

Original description: Hastigerinella moremani Cushman 1931: Test somewhat trochoid, but the spire very much depressed so that the chambers are for the most part in a single plane in the adult whorl; chambers in the early portion globular, later becoming more elongate, clavate, and slightly expanded toward the tip, usually finely spinose throughout, slightly more so toward the tip of the elongate chambers; aperture mostly vestral , with a slightly overhanging lip. Diameter 0.18 mm-0.25 mm; thickness 0.05-0.08 mm.

Entries in the Catalog of original descriptions: Hastigerinella moremani;

Geological Range:
Last occurrence (top): within D. concavata zone (86.71-89.91Ma, top in Coniacian stage). Data source: [copied from Chronos database]
First occurrence (base): within M. schneegansi zone (89.91-92.56Ma, base in Turonian 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:Stellatechamber arrangement:Trochospiraledge view:Equally biconvexaperture:Extraumbilical
umb chamber shape:Elongatecoiling axis:Lowperiphery:N/Aaperture border:Thin lip
sp chbr shape:Elongateumbilicus:Narrowperiph margin shape:Broadly roundedaccessory apertures:Relict
umbilical or test sutures:Moderately depressedumb depth:Shallowwall texture:Smoothshell porosity:
spiral sutures:Moderately depresseddiameter mm:0.28width mm:breadth mm:0.09
final-whorl chambers:5.5-6.0

References:

Cushman, J.A., (1931). A preliminary report on the foraminifera of Tennessee. Tennessee Division of Geology Bulletin, 41: 1-116.

Cushman, J.A., (1931). The foraminifera of the Atlantic Ocean. Part 8. Rotaliidae, Amphisteginidae, Calcarinidae, Cymbaloporettidae, Globorotaliidae, Anomalinidae, Planorbulinidae, Rupertiidae and Homotremidae. Smithsonian Institution United States National Museum Bulletin, 104(8): 1-179.

Cushman, J.A., (1931). The foraminifera of the Saratoga chalk. Journal of Paleontology, 5(4): 297-315.


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Clavihedbergella moremani compiled by the pforams@mikrotax project team viewed: 20-1-2018

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