pforams@mikrotax - Huberella praehuberi

Huberella praehuberi


Classification: pf_mesozoic -> Heterohelicidae -> Huberella -> Huberella praehuberi
Sister taxa: H. huberi, H. praehuberi, H. sp.

Taxonomy

Citation: Huberella praehuberi Georgescu 2007
Rank: Species
Basionym: Huberella praehuberi

Type images:

Original description: Test biserial throughout consisting of fifteen to seventeen chambers, which increase slowly in size as added. The proloculus is small-sized and is followed by the slightly large-side second chambers. Earlier chambers are subglobular in shape, then subrectangular, the last-formed ones being reniform and tilted and with a small test wall flexure oriented towards the zigzag suture. The resulted chamber inflation is attached to the previous formed chamber of the row in the morphologically advanced specimens. Test axis of growth can be slightly twisted in the plane of symmetry. Sutures are distinct, depressed, straight between the earlier chambers and curved between the last-formed ones, oblique to the test axis of growth. The test is symmetrical in edge view, with broadly rounded periphery and without peripheral structures. Aperture is a medium to high arch situated at the base of the last-formed chamber. It is bordered by two symmetrically developed periapertural flanges. False accessory apertural openings can be present along the zigzag suture at the specimens with developed text wall flexure. Chamber surface is ornamented with fine, often discontinuous and closely spaced costae. Test wall is calcareous, hyaline and microperforate, pore diameter ranging between 0.7 and 0.9 microns. Pores are mostly situated in the narrow spaces between costae, more rarely over these ornamentation elements resulting in interrupted ornamentation feature.

Entries in the Catalog of original descriptions: Huberella praehuberi


Emended description:


Morphology:

Wall type:

Size:

Character matrix
test outline:Subtriangularchamber arrangement:Biserialedge view:Compressedaperture:Interiomarginal
sp chamber shape:Reniformcoiling axis:N/Aperiphery:N/Aaperture border:Thin flange
umb chbr shape:Reniformumbilicus:N/Aperiph margin shape:Broadly roundedaccessory apertures:N/A
spiral sutures:Moderately depressedumb depth:N/Awall texture:Finely costateshell porosity:Microperforate: <1┬Ám
umbilical or test sutures:Moderately depressedfinal-whorl chambers:2.0-2.0 N.B. These characters are used for advanced search. N/A - not applicable

Geological Range:
Last occurrence (top): within D. concavata zone (86.71-89.91Ma, top in Coniacian stage). Data source: [copied from Chronos database]
First occurrence (base): within H. helvetica zone (92.56-93.52Ma, base in Turonian stage). Data source: [copied from Chronos database]

Plot of range and occurrence data:

References:

Georgescu, M. D. (2007a). A new planktonic heterohelicid foraminiferal genus from the Upper Cretaceous (Turonian). Micropaleontology. 53: 212-220. gs


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Huberella praehuberi compiled by the pforams@mikrotax project team viewed: 28-9-2022

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Short stable page link: https://mikrotax.org/pforams/index.php?id=110295 Go to Archive.is to create a permanent copy of this page - citation notes



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