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Rugotruncana nothi


Classification: pf_mesozoic -> Rugoglobigerinidae -> Rugotruncana -> Rugotruncana nothi
Sister taxa: R. circumnodifer, R. nothi, R. subcircumnodifer, R. sp.,

Taxonomy

Citation: Rugotruncana nothi Bronnimann and Brown 1956
Rank: Species
Basionym: Rugotruncana nothi
Taxonomic discussion: Holotype image is terrible in online E+M catalogue. [copied from Chronos database]

Type images:

Original description: The low trochospirally coiled test is covered with fine spines, pustules, and costellae. Its small early chambers are inflated and globirgerine-like. Its later chambers are moderately flattened both dorsally and ventrally. The last whorl is deeply notched and composed of six or seven overlapping chambers. All later chambers exhibit a double-keeled, imperforate, peripheral band. The two strongly spinose keels are parallel and close together at the posterior part of each of the later chambers but become sharply divergent toward the anterior part. The principal aperture is rounded, interiomarginal, and opens into a rather large umbilicus. Long apertural falps extend into the umbilicus, and in later chambers form a protruded, imperforate, umbilical cover-plate with accessory apertures.

Entries in the Catalog of original descriptions: Rugotruncana nothi

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 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

  • (NB There is no histogram as there are no occurrence records for the taxon in the Neptune database) Parent: Rugotruncana

    Character matrix

    test outline:Lobatechamber arrangement:Trochospiraledge view:Spiroconvexaperture:Umbilical
    sp chamber shape:Petaloidcoiling axis:Very lowperiphery:Double keelaperture border:Tegilla
    umb chbr shape:Petaloidumbilicus:Wideperiph margin shape:Subangularaccessory apertures:Infralaminal
    spiral sutures:Moderately depressedumb depth:Deepwall texture:Finely costateshell porosity:Microperforate: <1µm
    umbilical or test sutures:Moderately depressedfinal-whorl chambers:6.0-7.0 N.B. These characters are used for advanced search. N/A - not applicable

    References:

    Brönnimann, P. & Brown, N. K. (1956). Taxonomy of the Globotruncanidae. Eclogae Geologicae Helvetiae. 48: 503-562. gs


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    Rugotruncana nothi compiled by the pforams@mikrotax project team viewed: 18-10-2019

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    Short stable page link: http://mikrotax.org/pforams/index.php?id=110512 Go to Archive.is to create a permanent copy of this page - citation notes



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