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Muricohedbergella wondersi


Classification: pf_mesozoic -> Hedbergellidae -> Muricohedbergella -> Muricohedbergella wondersi
Sister taxa: M. almadenensis, M. angolae, M. astrepta, M. atlantica, M. blakensis, M. crassa, M. delrioensis, M. flandrini, M. hoelzli, M. holmdelensis, M. implicata, M. kyphoma, M. loetterli, M. monmouthensis, M. planispira, M. portsdownensis, M. praelibyca, M. rosebudensis, M. sliteri, M. wondersi, M. sp.,

Taxonomy

Citation: Muricohedbergella wondersi (Randrianasolo and Anglada, 1989)
Rank: Species
Basionym: Hedbergella wondersi

Type images:

Original description: Diagnose: Espèce du genre Hedbergella, trochospire basse, ouverture principale ombilicale it extra-ombilicale pouvant devenir spiro-ombillcale ; grosses pustules sur les premieres loges du demier tour.

Description
Face ombilicale: Ouverture primaire intériomarginale, ombilicale it extraombilicale, une lèvre plus ou moins large est visible sur les 2 ou 3 dernières loges. Sutures droites, déprimées. 6 à 8 loges subtriangulaires au demier tour. Ornementation: pustules sur les premiéres loges du dernier tour, absentes sur les derniéres. Ombilic peu profond.

Face spirale: Plane à légèrement concave. Chez les formes évoluées à ouverture spiro-ombilicale, ouverture primaire visible et possibilité d'ouvertures résiduelles. Contour lobé. Sutures déprimées, sutures intercamérales radiales it légàrement courbes. Loges globuleuses. Ornementation : pustules plus développées sur les premieres loges du dernier tour. Loges à croissance modérée.

Profll: Trochospire très basse avec tendance à la planispiralit.é Périphérie arrondie. Ouverture primaire basse pouvant devenir spiro-ombilicale.

Entries in the Catalog of original descriptions: Hedbergella wondersi


Emended description: Test low trochospiral, equatorial outline oblate, peripheral margin rounded; wall macroperforate; chambers inflated subtriangular, 7-9 increasing slowly in size as added, muricae on the first chambers of the last whorl; primary aperture from umbilical-extraumbilical to slightly equatorial, sutures straight and depressed on both sides. [copied from Chronos database]

Geological Range:
Last occurrence (top): in lower part of P. ticinensis zone (30% up, 103.3Ma, in Albian stage). Data source:
First occurrence (base): within P. subticinensis zone (103.94-106.98Ma, base in Albian stage). Data source: [copied from Chronos database]

Plot of occurrence data:

Dec 2017 - Plotting of Neptune data has been re-enabled on the Mesozoic pages following revision of the age-models in Neptune. The data is, however, still very sparse for the Early Cretaceous

Character matrix

test outline:chamber arrangement:Trochospiraledge view:aperture:Umbilical-extraumbilical
sp chamber shape:Subtriangularcoiling axis:Very lowperiphery:N/Aaperture border:
umb chbr shape:umbilicus:periph margin shape:accessory apertures:
spiral sutures:Moderately depressedumb depth:wall texture:Moderately muricateshell porosity:Macroperforate: >2.5µm
umbilical or test sutures:Moderately depressedfinal-whorl chambers:7.0-9.0 N.B. These characters are used for advanced search. N/A - not applicable

References:

Petrizzo, M. R. & Huber, B. T. (2006). Biostratigraphy and taxonomy of late Albian planktonic foraminifera from ODP Leg 171B (western North Atlantic Ocean). Journal of Foraminiferal Research. 36: 166-190. gs

Randrianasolo, A. & Anglada, R. (1989). La lignée Hedbergella wondersi nov. sp.-Planomalina buxtorfi (Gandolfi) (foraminiferes planktoniques) dans l'Albo-Cénomanien du Bassin d'Antsiranana (nord de Madagascar). Geobios. 22: 803-823. gs


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Muricohedbergella wondersi compiled by the pforams@mikrotax project team viewed: 30-9-2020

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Short stable page link: http://mikrotax.org/pforams/index.php?id=110378 Go to Archive.is to create a permanent copy of this page - citation notes



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