Taxonomy
Original description: Test small. Coiled in a very low to planar trochospire consisting of two and half whorls; peripheral margin quadrate lobate; four chambers in the last whorl, increasing quadrally in sizes as added; chambers globular, somewhat ovoidal on both spiral and umbilical sides, separated by deeply incised sutures; chambers typical ovoidal in peripheral view; sutures radial, slightly curved on both spiral and umbilical sides; wall fine-perforate, surface smooth; primary aperture highly arcuate, extra-umbilical-umbilical bordered by an imperforate flap; umbilicus circular, deep.
Entries in the Catalog of original descriptions: Caucasella handousi
Emended description:
Character matrix
test outline: | Lobate | chamber arrangement: | Trochospiral | edge view: | Compressed | aperture: | Extraumbilical |
sp chamber shape: | Inflated | coiling axis: | Low | periphery: | N/A | aperture border: | Thin lip |
umb chbr shape: | Inflated | umbilicus: | Narrow | periph margin shape: | Broadly rounded | accessory apertures: | None |
spiral sutures: | Strongly depressed | umb depth: | Shallow | wall texture: | Smooth | shell porosity: | Finely Perforate: 1-2.5µm |
umbilical or test sutures: | Strongly depressed | final-whorl chambers: | 4-4.5 | N.B. These characters are used for advanced search. N/A - not applicable |
Geological Range:
Last occurrence (top): within Hauterivian Stage (126.50-132.60Ma, top in Hauterivian stage). Data source: [copied from Chronos database]
First occurrence (base): within Hauterivian Stage (126.50-132.60Ma, base in Hauterivian stage). Data source: [copied from Chronos database]
Plot of range and occurrence data:
Salaj, J. (1984). Foraminifers and detailed microbiostratigraphy of the boundary beds of the Lower Cretaceous stages in the Tunisian Atlas. Geologiscky Zbornik -Geologica Carpathica. 35(5): 583-599. gsReferences:
Hedbergella handousi compiled by the pforams@mikrotax project team viewed: 10-9-2024
Short stable page link: https://mikrotax.org/pforams/index.php?id=110243 Go to Archive.is to create a permanent copy of this page - citation notes |
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