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Costellagerina


Classification: pf_mesozoic -> Hedbergellidae -> Costellagerina
Sister taxa: Asterohedbergella, Clavihedbergella, Costellagerina, Falsotruncana, Hedbergella, Helvetoglobotruncana, Liuenella, Microhedbergella, Muricohedbergella, Paracostellagerina, Paraticinella, Praeglobotruncana, Pseudoguembelitria, Whiteinella,
Daughter taxa: (blue => in age window 0-800Ma)


Specimens which cannot be assigned to established species

Taxonomy

Citation: Costellagerina S. W. Petters, El-Nakhal, and Cifelli 1983
Rank: Genus
Basionym: Rugoglobigerina bulbosa
Type species: Rugoglobigerina bulbosa Belford, 1960

Original description:

Test low to medium trochospirai; outline sub-circular, ovate, or quadrate; equatorial periphery strongly lobulate; axial periph- ery broadly rounded; chambers globose; aperture an interiomarginal, low arch, umbilical to slightly extraumbilical, bordered by a porticus; umbilicus open, small tomoderate in size. Wall hyaline, ornamented with pustules and costellae which are meridionally arranged.

Entries in the Catalog of original descriptions: Costellagerina

Distinguishing features: Test with low to medium trochospiral coil of few, rapidly enlarging, spherical chambers per whorl, sutures radial, depressed, periphery rounded, peripheral margin lobulate; wall calcareous, hyaline, optically radial, finely perforate, surface with meridionally aligned pustules and costellae resulting from fusion of adjacent pustules; aperture a low interiomarginal, umbilical to slightly extraumbilical arch, with a narrow bordering lip.

Geological Range:
Last occurrence (top): within Campanian Stage (72.05-83.64Ma, top in Campanian stage). Data source: Total of range of species in this database
First occurrence (base): within Coniacian Stage (86.26-89.77Ma, base in Coniacian stage). Data source: Total of range of species in this 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

References:

Loeblich, A. R. & Tappan, H. (1988). Foraminiferal Genera and Their Classification (Volume I-II). Van Nostrand Reinhold Co., New York. 1-1059. gs :: ::

Petters, S. W., El-Nakhal, H. A. & Cifelli, R. (1983). Costellagerina, a new late Cretaceous Globigerine foraminiferal genus. Journal of Foraminiferal Research. 13(4): 247-251. gs :: ::


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Costellagerina compiled by the pforams@mikrotax project team viewed: 2-7-2020

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Short stable page link: http://mikrotax.org/pforams/index.php?id=110078 Go to Archive.is to create a permanent copy of this page - citation notes



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