pforams@mikrotax - Plummerita kennerleyi

Plummerita kennerleyi


Classification: pf_mesozoic -> Rugoglobigerinidae -> Plummerita -> Plummerita kennerleyi
Sister taxa: P. hantkeninoides, P. kennerleyi, P. reicheli, P. sp.

Taxonomy

Citation: Plummerita kennerleyi Whittaker 1980
Rank: Species
Basionym: Plummerita kennerleyi

Type images:

Original description: Diagnosis: A moderately inflated species of Plummerita with 4-5 chambers in the final whorl. Tubulospines developed only in last three chambers, paired. one at each angle of the periphery and oblique to the plane of coiling. Ornament of meridionally arra nged ridges strongly developed.

Description: Test a low trochospire consisting of about two whorls. Outline in spiral and umbilical views lobulate then tubulospinate; five chambers in final whorl, subglobular at first, gradually increasing in size, with last two chambers each produced into two tubulospines at opposite angles to the mid-line of the periphery. Lower periphery rounded in edge view, upper margin tubulospinose. Sutures moderatelly depressed, curved. Wall calcareous, finely perforate, test surface ornamented by strong, meridionally arranged ridges which extend to the tubulospines. Umbilicus shallow, aperture appears to be an interiomarginal, umbilical-extraumbilical arch; tegillum not preserved.

Entries in the Catalog of original descriptions: Plummerita kennerleyi


Emended description:


Morphology:

Wall type:

Size:

Character matrix
test outline:Stellatechamber arrangement:Trochospiraledge view:Inequally biconvexaperture:Umbilical
sp chamber shape:coiling axis:Very lowperiphery:N/Aaperture border:Tegilla
umb chbr shape:Inflatedumbilicus:Narrowperiph margin shape:Broadly roundedaccessory apertures:N/A
spiral sutures:Strongly depressedumb depth:Deepwall texture:Meridional costellaeshell porosity:Finely Perforate: 1-2.5µm
umbilical or test sutures:Strongly depressedfinal-whorl chambers:4.5-5.5 N.B. These characters are used for advanced search. N/A - not applicable

Geological Range:
Last occurrence (top): within A. mayaroensis zone (67.30-69.18Ma, top in Maastrichtian stage). Data source: [copied from Chronos database]
First occurrence (base): within A. mayaroensis zone (67.30-69.18Ma, base in Maastrichtian stage). Data source: [copied from Chronos database]

Plot of range and occurrence data:

References:

Whittaker, J. E. (1980). Revision of Plummerita Brönnimann (Foraminiferida) and a new Maastrichtian species from Ecuador. Bulletin of the British Museum (Natural History) Geology. 34(4): 289-297. gs


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Plummerita kennerleyi compiled by the pforams@mikrotax project team viewed: 2-12-2022

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Short stable page link: https://mikrotax.org/pforams/index.php?id=110422 Go to Archive.is to create a permanent copy of this page - citation notes



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