Taxonomy
Original description: Translated from French: Test small, calcareous, finely perforate, trochoidal, sutures distinct and depressed. Nine to 11 chambers, 4 to 5 small chambers forming 1 - 1.5 internal whorls. Five to 6 chambers, regularly and strongly increasing in size in the last whorl and shaping a stellate outline with ogival ends. In most specimens these chambers are axially elongate, the axes inclining forward and also lying on either side of the equatorial plane. Apertural side convex, equi-dimensional or with a shape varying from an almost square to ogival section. Spiral side generally flat. On the umbilical side, a wide and depressed umbilicus. Aperture arched, interiomarginal, located at the base of the umblical side.
Entries in the Catalog of original descriptions: Hastigerinella bizonae, Lilliputianella longorii
Emended description:
Character matrix
| test outline: | Stellate | chamber arrangement: | Trochospiral | edge view: | Hourglass | aperture: | - |
| sp chamber shape: | Subtriangular | coiling axis: | Very low | periphery: | N/A | aperture border: | Thin lip |
| umb chbr shape: | Subtriangular | umbilicus: | Narrow | periph margin shape: | Subangular | accessory apertures: | N/A |
| spiral sutures: | Strongly depressed | umb depth: | Shallow | wall texture: | Finely pustulose | shell porosity: | Finely Perforate: 1-2.5µm |
| umbilical or test sutures: | Strongly depressed | final-whorl chambers: | 5-6.5 | N.B. These characters are used for advanced search. N/A - not applicable | |||
Geological Range:
Last occurrence (top): within G. algerianus zone (116.86-118.24Ma, top in Aptian stage). Data source: [copied from Chronos database]
First occurrence (base): within G. blowi zone (120.55-124.40Ma, base in Barremian stage). Data source: [copied from Chronos database]
Plot of range and occurrence data:
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Hedbergella bizonae compiled by the pforams@mikrotax project team viewed: 9-8-2026
Short stable page link: https://mikrotax.org/pforams/index.php?id=110238 Go to Archive.is to create a permanent copy of this page - citation notes |
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