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Radotruncana subspinosa


Classification: pf_mesozoic -> Globotruncanidae -> Radotruncana -> Radotruncana subspinosa
Sister taxa: R. calcarata, R. subspinosa, R. sp.,

Taxonomy

Citation: Radotruncana subspinosa (Pessagno, 1960)
Rank: Species
Basionym: Globotruncana (Globotruncana) subspinosa Pessagno, 1960
Taxonomic discussion: Holotype deposited in the Cole Collection, Cornell University, Ithaca, NY. [copied from Chronos database]

Type images:

Original description: "Test trochospiral coiled, biconvex to moderately convex ventrally and slightly convex dorsally. Umbilicus large, often flanked by a beaded margin. Sutures straight to slightly curved dorsally, moderately curved ventrally, usually heavily beaded. Chambers more or less angular rhombohedral in shape; 6-7 chambers in last whorl; dorsal surface of chambers sometimes crenulate. Periphery single-keeled, usually quite lobulate. Wall calcareous, finely perforate. Primary aperture interiomarginal, umbilical."

Entries in the Catalog of original descriptions: Globotruncana (Globotruncana) subspinosa

Geological Range:
Last occurrence (top): within R. fructicosa zone (69.18-70.14Ma, top in Maastrichtian stage). Data source: [copied from Chronos database]
First occurrence (base): within G. ventricosa zone (76.18-79.20Ma, base in Campanian 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

  • Histogram - Neptune occurrence data from DSDP and ODP proceedings. Pale shading <50 samples in time bin. Interpret with caution & read these notes
  • Note to users in China - the diagram may not plot unless you use a VPN since I use google services on the website. If this is a problem please contact me 谢谢.
  • Taxon plotted: Radotruncana subspinosa, synonyms included - Globotruncana subspinosa; Globotruncanita subspinosa; Radotruncana subspinosa; space-time plot :: Samples map :: Parent: Radotruncana

    Character matrix

    test outline:Lobatechamber arrangement:Trochospiraledge view:Planoconvexaperture:Umbilical
    sp chamber shape:Petaloidcoiling axis:Very lowperiphery:Single keelaperture border:Coalescing portici
    umb chbr shape:Inflatedumbilicus:Narrowperiph margin shape:Subangularaccessory apertures:Intralaminal
    spiral sutures:Raised beadedumb depth:Deepwall texture:Finely pustuloseshell porosity:
    umbilical or test sutures:Moderately depressedfinal-whorl chambers:5.0-6.0 N.B. These characters are used for advanced search. N/A - not applicable

    References:

    Pessagno, E. A. (1960). Stratigraphy and micorpaleontology of the Cretaceous and lower Tertiary of Puerto Rico. Micropaleontology. 6(1): 87-110. gs


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    Radotruncana subspinosa compiled by the pforams@mikrotax project team viewed: 25-8-2019

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    Short stable page link: http://mikrotax.org/pforams/index.php?id=110488 Go to Archive.is to create a permanent copy of this page - citation notes



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