Catalog - Huberella praehuberi Catalog - Huberella praehuberi

CATALOG OF ORIGINAL DESCRIPTIONS: Huberella praehuberi Georgescu 2007

This page provides data from the catalog of type descriptions. The catalog is sorted alphabetically. Use the current identification link to go back to the main database.


Higher levels: pf_cat -> H -> Huberella -> Huberella praehuberi
Other pages this level: H. huberi, H. praehuberi, H. yucatanensis

Huberella praehuberi

Citation: Huberella praehuberi Georgescu 2007
taxonomic rank: Species
Type specimens: 534391
Type age (chronostrat): Turonian (Helvetoglobotruncana helvetica Biozone)
Type locality: DSDP Leg 62, Site 463 (Shatsky Rise, equatorial Pacific). Geographical coordinates: 21 21' N, 174 40' E.
Type repository: Washington; USNM

Linked specimens: USNM-534392 USNM-546324 USNM-534391 USNM-546326 USNM-546327 USNM-546325

Current identification/main database link: Huberella praehuberi Georgescu 2007


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.

Size:
Dimensions of the holotype. Length: L = 0.322 mm; width: W = 0.217 mm; W/L = 0.653; thickness: t = 0.117 mm; t/L = 0.352.

Etymology:
Prefix “prae-” is added to the species name “huberi”.

Extra details from original publication
Remarks. H. praehuberi differs from Heterohelix moremani in having (i) costate ornamentation rather than smooth test surface and (ii) the presence of the test wall flexure resulting in chamber inflation, which is attached to the previous chamber of the row.

References:

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

Georgescu, M. D. (2007b). Taxonomic re-evaluation of the Late Cretaceous serial planktonic foraminifer Gümbelina punctulata Cushman, 1938 and related species. Revista Española de Micropaleontología. 39: 1-14. gs


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Huberella praehuberi compiled by the pforams@mikrotax project team viewed: 16-9-2024

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