Specimens which cannot be assigned to established species
| Daughter taxa (time control age-window is: 0-800Ma) | ||||
| | | Huberella huberi | |
| | | Huberella praehuberi | |
| Huberella sp. Specimens which cannot be assigned to established species | ||||
DSDP Site 463-461-757.JPGTaxonomy
Original description: Diagnosis. Test biserial throughout; last-formed chambers with test wall flexure resulting in projections attached to the previous chamber in the row; no accessory apertures are present along the zigzag suture; chamber surface finely costate; test wall calcareous, micrcroperforate.
Description. Test biserial throughout. Proloculus is smaller than the second chamber. Chambers are subglobular to reniform in shape, tilted to the axis of growth at least in the adult portion of the test. Chamber projections attached to the previously formed ones in the row are present in the morphologically advanced tests. Sutures are distinct, depressed, straight to curved, oblique to the test axis of growth. Periphery broadly rounded, without peripheral structures. Aperture is situated at the base of the last-formed chamber and is bordered by two symmetrical periapertural flanges. No accessory apertures are present along the zigzag suture. Chamber surface is ornamented with fine, closely spaced and often discontinuous costae. Test wall is calcareous, hyaline, microperforate.
Entries in the Catalog of original descriptions: Huberella
Distinguishing features:
Parent taxon (Heterohelicidae): Aperture symmetrical, ranging from a low slit to a high arch at the base of the final chamber, becoming terminal in uniserial taxa.
This taxon: Biserial throughout, chambers with projections along the medial suture, like Pseudoguembelina, but without supplementary apertures, wall texture finely costate.
Geological Range:
Last occurrence (top): near top of Coniacian Stage (87% up, 86.7Ma, in Coniacian stage). Data source: Total of range of species in this database
First occurrence (base): near base of Turonian Stage (9% up, 93.5Ma, in Turonian stage). Data source: Total of range of species in this database
Plot of range and occurrence data:
Georgescu, M. D. (2007a). A new planktonic heterohelicid foraminiferal genus from the Upper Cretaceous (Turonian). Micropaleontology. 53: 212-220. gsReferences:
 |
Huberella compiled by the pforams@mikrotax project team viewed: 20-3-2023
Short stable page link: https://mikrotax.org/pforams/index.php?id=110293 Go to Archive.is to create a permanent copy of this page - citation notes |
Comments
(0)