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Archaeoglobigerina


Classification: pf_mesozoic -> Rugoglobigerinidae -> Archaeoglobigerina
Sister taxa: Archaeoglobigerina, Bucherina, Kuglerina, Plummerita, Rugoglobigerina, Rugotruncana, Trinitella,
Daughter taxa (blue => in age window 0-300Ma)





Specimens which cannot be assigned to established species

Taxonomy

Citation: Archaeoglobigerina Pessagno 1967
Rank: Genus
Basionym: Archaeoglobigerina blowi
Type species: Archaeoglobigerina blowi Pessagno, 1967
Taxonomic discussion: As noted in the discussion of Rugotrnncana, the type species of that genus has two peripheral keels and irregularly arranged costellae, hence Archaeoglobigerina is here restricted to those species without keel. It differs from Rugoglobigerina in lacking meridional alignment of pustules and costellae. Both Fissoarchaeoglobigerina and Kassabella were described as having sutural supplementary apertures on the spiral side, the former said to have tegilla and the latter to have simple apertural lips. However, the presence of true secondary openings appears questionable, and the strongly thickened tegillum reported for Fissoarchaeoglobigerina appears to be the result of secondary calcification rather than a characteristic feature of the foraminifer. The "well-developed lip extending into the umbilicus" of Kassabella is not shown in the original figures, although the umbilicus appears to show remnants of a tegillum. Both are regarded as synonyms of Archaeoglobigerina, pending description of better preserved material.

Type images:

Original description: Archaeoglobigerina:

Entries in the Catalog of original descriptions: Archaeoglobigerina;

Short diagnosis: 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.

Geological Range:
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:

NB Plotting of Neptune data has been disabled on the Mesozoic pages because the dataset is both small and badly affected by a few sites with erroneous age models (our obs Huber, Petrizzo, Young, Nov 2016). The data can still be viewed via the range plottertool - tools menu.

References:

Loeblich, A.R., Jr. & Tappan, H., (1961). Cretaceous planktonic foraminifera: Part I-Cenomanian. Micropaleontology, 7: 257-304.

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


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Archaeoglobigerina compiled by the pforams@mikrotax project team viewed: 17-12-2017

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