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pforams@mikrotax - Muricohedbergella monmouthensis pforams@mikrotax - Muricohedbergella monmouthensis

Muricohedbergella monmouthensis


Classification: pf_mesozoic -> Hedbergellidae -> Muricohedbergella -> Muricohedbergella monmouthensis
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 monmouthensis (Olsson, 1960)
Taxonomic rank: species
Basionym: Globorotalia monmouthensis Olsson, 1960
Synonyms:
Taxonomic discussion: Neotype selected by Olsson et al. (1999) to replaced lost holotype.
Combniation in Muricohedbergella propsed by Huber & Leckie 2011

Type images:

Original description: Test.--very low trochospiral, nearly planispiral in appearance. Equatorial periphery strongly lobate. Axial periphery rounded.
Wall.--calcareous, finely perforate, covered with short minute spines.
Chambers.--inflated, globular; about 15 arranged in 2 1/2 whorls. The 5, occasionally 6, chambers of the final whorl increase rather rapidly in size; the last two make up over 1/2 of the test.
Sutures.--spiral side: oblique in early stages to straight in adult stages, depressed, Umbilical side: radial, depressed.
Umbilicus.--narrow, deep.
Aperture.--a low arch with a distinct lip; interiomarginal, extraumbilical-umbilical.
Coiling.--random. 

Entries in the Catalog of original descriptions: Globorotalia monmouthensis

Character matrix
test outline:Lobatechamber arrangement:Trochospiraledge view:aperture:
sp chamber shape:Globularcoiling axis:Very lowperiphery:N/Aaperture border:Thin lip
umb chbr shape:Globularumbilicus:Narrowperiph margin shape:Broadly roundedaccessory apertures:Relict
spiral sutures:Strongly depressedumb depth:Deepwall texture:Finely pustuloseshell porosity:Finely Perforate: 1-2.5µm
umbilical or test sutures:Strongly depressedfinal-whorl chambers:5-6 N.B. These characters are used for advanced search. N/A - not applicable

Geological Range:
Last occurrence (top): within P0 zone (66.00-66.04Ma, top in Danian stage). Data source: [copied from Chronos database]
First occurrence (base): within G. gansseri zone (71.73-73.80Ma, base in Campanian stage). Data source: [copied from Chronos database]

Plot of range and occurrence data:

References:

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

Olsson, R. K. (1960). Foraminifera of late Cretaceous and earliest Tertiary age in the New Jersey Coastal Plain. Journal of Paleontology. 34(1): 1-58. gs

Olsson, R. K., Hemleben, C., Berggren, W. A. & Huber, B. T. (1999). Atlas of Paleocene Planktonic Foraminifera. Smithsonian Institution Press, Washington, DC. (85): 1-252. gs

Pessagno, E. A. (1967). Upper Cretaceous planktonic foraminifera from the western Gulf Coastal Plain. Palaeontographica Americana. 5: 245-445. gs O

Smith, C. C. & Pessagno, E. A. (1973). Planktonic foraminifera and stratigraphy of the Corsicana formation (Maestrichtian) North-central Texas. Cushman Foundation for Foraminiferal Research, Special Publication. 12: 1-67. gs O


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Muricohedbergella monmouthensis compiled by the pforams@mikrotax project team viewed: 22-4-2025

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