Taxonomy
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: | Stellate | chamber arrangement: | Trochospiral | edge view: | Equally biconvex | aperture: | Extraumbilical |
sp chamber shape: | Elongate | coiling axis: | Low | periphery: | N/A | aperture border: | Thin lip |
umb chbr shape: | Elongate | umbilicus: | Narrow | periph margin shape: | Broadly rounded | accessory apertures: | Relict |
spiral sutures: | Moderately depressed | umb depth: | Shallow | wall texture: | Smooth | shell porosity: | |
umbilical or test sutures: | Moderately depressed | final-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:
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 OReferences:
Clavihedbergella moremani compiled by the pforams@mikrotax project team viewed: 10-12-2024
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)
The specimen above from Leckie (1984) is actually the holotype of Clavihedbergella leckie (Bellier et al. 2003).
Thanks - I have now reassigned the image
Jeremy