pforams@mikrotax - Hedbergella

pforams@mikrotax - Hedbergella pforams@mikrotax - Hedbergella

Hedbergella

Classification: pf_mesozoic -> Hedbergellidae -> Hedbergella
Sister taxa: Asterohedbergella, Clavihedbergella, Costellagerina, Falsotruncana, Hedbergella, Helvetoglobotruncana, Liuenella, Microhedbergella, Muricohedbergella, Paracostellagerina, Paraticinella, Praeglobotruncana, Pseudoguembelitria, Whiteinella

Daughter taxa (time control age-window is: 0-800Ma)
			Hedbergella aptiana
			Hedbergella bizonae
			Hedbergella bollii
			Hedbergella compacta
			Hedbergella excelsa
			Hedbergella gorbachikae
			Hedbergella handousi
			Hedbergella hexacamerata
			Hedbergella hispaniae
			Hedbergella infracretacea
			Hedbergella kuhryi
			Hedbergella kuznetsovae
			Hedbergella labocaensis
			Hedbergella luterbacheri
			Hedbergella maslakovae
			Hedbergella mitra
			Hedbergella occulta
			Hedbergella praelippa
			Hedbergella praetrocoidea
			Hedbergella primare
			Hedbergella quadricamerata
			Hedbergella roblesae
			Hedbergella ruka
			Hedbergella semielongata
			Hedbergella sigali
			Hedbergella similis
			Hedbergella speetonensis
			Hedbergella tardita
			Hedbergella tatianae
			Hedbergella trocoidea
			Hedbergella tuschepsensis
			Hedbergella ventriosa
			Hedbergella sp. Specimens which cannot be assigned to established species

Taxonomy

Citation: Hedbergella Bronnimann&Brown 1958

taxonomic rank: Genus

Type species: Anomalina lorneiana d'Orbigny var. trochoidea Gandolfi, 1942

Synonyms:

Blefuscuiana Banner & Desai 1988 - the type species of Blefuscuiana, is here included in Hedbergella, as H. kuznetsovae, so Blefusciana is a synonym of Hedbergella.
Lilliputianella Banner & Desai 1988 - the type species of Lilliputianella, L. longorii, is here regarded a synonym of Hedbergella bizonae, so Lilliputianella is a synonym of Hedbergella.

Original description: The smooth- to rough-walled, calcareous hyaline test is trochospirally coiled. Its small early chambers are globular, inflated, and globigerine-like. The last few chambers are elongated and extend into a relatively small umbilicus. The aperture is rounded interiomarginal, and opens into the umbilicus. Short apertural flaps extend into the umbilicus but do not form an umbilical cover-plate. Family Globotruncanidae.

Entries in the Catalog of original descriptions: Hedbergella, Blefuscuiana, Lilliputianella

Distinguishing features:
Parent taxon (Hedbergellidae): Test trochospirally coiled, primary aperture interiomarginal, extraumbilical-umbilical, with prominent apertural lip, apertures of earlier chambers remain visible around the umbilical region; no sutural secondary apertures.
This taxon: Test trochospiral, wall finely perforate, outer wall weakly to densely covered with perforation cones or perforation ridges (coalescing perforation cones); umbilical and spiral sutures depressed, radial, straight to slightly curved; aperture an interiomarginal extraumbilical-umbilical arch with a thin imperforate rim, rarely with a narrow bordering lip.

Emended description:

Huber and Leckie, 2011: Test wall finely perforate, outer wall weakly to densely covered with perforation cones or perforation ridges (coalescing perforation cones), never with an imperforate or keeled peripheral margin or with muricae and rarely with small, blunt pustules. Test small to relatively large in size, coiled in a low to moderately high trochospire with a rounded equatorial periphery, umbilicate; chambers globular to ovate, four to nine in the final whorl; umbilical and spiral sutures depressed, radial, straight to slightly curved; aperture an interiomarginal extraumbilical-umbilical arch with a thin imperforate rim or in rare cases a narrow bordering lip.

Character matrix
test outline: - chamber arrangement: Trochospiral edge view: - aperture: -
sp chamber shape: - coiling axis: - periphery: N/A aperture border: -
umb chbr shape: - umbilicus: - periph margin shape: - accessory apertures: -
spiral sutures: - umb depth: - wall texture: - shell porosity: -
umbilical or test sutures: - final-whorl chambers: 4-9 N.B. These characters are used for advanced search. N/A - not applicable

Geological Range:
Last occurrence (top): at top of P. appenninica zone (100% up, 100.5Ma, in Albian stage). Data source: Total of ranges of the species in this database
First occurrence (base): within H. sigali zone (130.37-134.74Ma, base in Valanginian stage). Data source: Total of ranges of species in this database

Plot of range and occurrence data:

Range-bar - range as quoted above, pink interval top occurs in, green interval base occurs in.
Triangles indicate an event for which a precise placement has been suggested
Neptune data: This is a higher taxon page so Neptune data is not plotted. See also: customisable plot Parent: Hedbergellidae

References:

Banner, F. T. & Desai, D. (1988). A review and revision of the Jurassic-Early Cretaceous Globigerinina,with especial reference to the Aptian assemblages of Speeton (North Yorkshire, England). Journal of Micropalaeontology. 7: 143-185. gs

Huber, B. T. & Leckie, R. M. (2011). Planktic foraminiferal species turnover across deep-sea Aptian/Albian boundary sections. Journal of Foraminiferal Research. 41: 53-95. gs

Loeblich, A. R. & Tappan, H. (1988). Foraminiferal Genera and Their Classification (Volume I-II). Van Nostrand Reinhold Co., New York. 1-1059. gs

Hedbergella compiled by the pforams@mikrotax project team viewed: 16-10-2024

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Short stable page link: https://mikrotax.org/pforams/index.php?id=110234 Go to Archive.is to create a permanent copy of this page - citation notes

test outline:	-	chamber arrangement:	Trochospiral	edge view:	-	aperture:	-
sp chamber shape:	-	coiling axis:	-	periphery:	N/A	aperture border:	-
umb chbr shape:	-	umbilicus:	-	periph margin shape:	-	accessory apertures:	-
spiral sutures:	-	umb depth:	-	wall texture:	-	shell porosity:	-
umbilical or test sutures:	-	final-whorl chambers:	4-9	N.B. These characters are used for advanced search. N/A - not applicable