|Daughter taxa: (blue => in age window 0-300Ma)|
Original description: Archaeoglobigerina: Test trochospiral. biconvex to slightly spiroconvex, umbilicate; periphery rounded, but not truncate; with or without imperforate peripheral band or weakly developed double keel. Chambers spherical to ovate, inflated. Suture depressed on both spiral and umbilical sides. straight to curved. Wall perfectly smooth to somewhat rugose; rugosities not aligned in meridionial pattern. Primary aperture umbilical, interiomarginal, covered by tegilla with intralaminal and infralaminal accessory apertures in perfectly preserved specimens. Outer wall radial hyaline perforate except for keels which are both radial hyaline imperforate and partly ultragranular hyaline, imperforate and the rugosities which are ultragranular hyaline, imperforate. Septal walls and tegilla microgranular hyaline. finely perforate.
Entries in the Catalog of original descriptions: Archaeoglobigerina;
Distinguishing features: Test a low to flat trochospire, chambers globular and enlarging rapidly, four to six in the final whorl, sutures radial and depressed, umbilicus wide, occupying one-fourth to one-third of the diameter, periphery rounded, without keel or imperforate carinal band, peripheral outline lobate; wall calcareous, perforate, surface rugose, with irregularly arranged pustules and costellae, never meridionally aligned; primary aperture interiomarginal, umbilical, with tegilla filling the umbilicus and provided with both proximal and distal accessory apertures.
Last occurrence (top): within Maastrichtian Stage (66.04-72.05Ma, top in Maastrichtian stage). Data source: Total of range of species in this database
First occurrence (base): within Turonian Stage (89.77-93.90Ma, base in Turonian 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
Loeblich, A.R. & Tappan, H., (1961). Cretaceous planktonic foraminifera: Part I-Cenomanian. Micropaleontology, 7: 257-304. Loeblich, A.R. & Tappan, H., (1988). Foraminiferal Genera and Their Classification (Volume I-II)Van Nostrand Reinhold Co., New York, 1059 pp.
Loeblich, A.R. & Tappan, H., (1961). Cretaceous planktonic foraminifera: Part I-Cenomanian. Micropaleontology, 7: 257-304.
Loeblich, A.R. & Tappan, H., (1988). Foraminiferal Genera and Their Classification (Volume I-II)Van Nostrand Reinhold Co., New York, 1059 pp.
Archaeoglobigerina compiled by the pforams@mikrotax project team viewed: 16-11-2018