pforams@mikrotax - Costellagerina pforams@mikrotax - Costellagerina


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

Costellagerina pilula

Costellagerina sp.
Specimens which cannot be assigned to established species


Citation: Costellagerina S. W. Petters, El-Nakhal,&Cifelli 1983
taxonomic rank: Genus
Type species: Rugoglobigerina bulbosa Belford, 1960

Original description: Test low to medium trochospirai; outline sub-circular, ovate, or quadrate; equatorial periphery strongly lobulate; axial periphery 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:
Parent taxon (Hedbergellidae): Test trochospirally coiled, primary aperture interiomarginal, extraumbilical-umbilical, with prominent apertural lip, apertures of earlier chambers remain visible around the umbilical region; no sutural secondary apertures.
This taxon: 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): at top of G. elevata zone (100% up, 79.3Ma, in Campanian stage). Data source: Total of ranges of the species in this database
First occurrence (base): within D. asymetrica zone (83.65-85.60Ma, base in Santonian stage). Data source: Total of ranges of species in this database

Plot of range and occurrence data:


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


Costellagerina compiled by the pforams@mikrotax project team viewed: 25-6-2024

Taxon Search:
Advanced Search

Short stable page link: Go to to create a permanent copy of this page - citation notes

Add Comment

* Required information
Captcha Image
Powered by Commentics


No comments yet. Be the first!