pforams@mikrotax - Clavihedbergella moremani pforams@mikrotax - Clavihedbergella moremani

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)
taxonomic rank: Species
Basionym: Hastigerinella moremani

Type images:

Original description: 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

Character matrix
test outline:Stellatechamber arrangement:Trochospiraledge view:Equally biconvexaperture:Extraumbilical
sp chamber shape:Elongatecoiling axis:Lowperiphery:N/Aaperture border:Thin lip
umb chbr shape:Elongateumbilicus:Narrowperiph margin shape:Broadly roundedaccessory apertures:Relict
spiral sutures:Moderately depressedumb depth:Shallowwall texture:Smoothshell porosity:
umbilical or test sutures:Moderately depressedfinal-whorl chambers:5.5-6 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 M. schneegansi zone (89.75-92.51Ma, base in Turonian stage). Data source: [copied from Chronos database]

Plot of range and occurrence data:

References:

Cushman, J. A. (1931a). Hastigerinella and other interesting foraminifera from the Upper Cretaceous of Texas. Contributions from the Cushman Laboratory for Foraminiferal Research. 7(4): 17-19. gs

Eicher, D. L. & Worstell, P. (1970). Lunatriella, a Cretaceous heterohelicid foraminifer from the western interior of the United States. Micropaleontology. 16(1): 117-121. gs

Pessagno, E. A. (1967). Upper Cretaceous planktonic foraminifera from the western Gulf Coastal Plain. Palaeontographica Americana. 5: 245-445. gs O


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Clavihedbergella moremani compiled by the pforams@mikrotax project team viewed: 10-12-2024

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Short stable page link: https://mikrotax.org/pforams/index.php?id=110044 Go to Archive.is to create a permanent copy of this page - citation notes



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Comments (2)

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The specimen above from Leckie (1984) is actually the holotype of Clavihedbergella leckie (Bellier et al. 2003).

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Thanks - I have now reassigned the image

Jeremy