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Archaeoglobigerina blowi


Classification: pf_mesozoic -> Rugoglobigerinidae -> Archaeoglobigerina -> Archaeoglobigerina blowi
Sister taxa: A. australis, A. blowi, A. bosquensis, A. cretacea, A. mateola,

Taxonomy

Citation: Archaeoglobigerina blowi Pessagno 1967
Rank: Species
Basionym: Archaeoglobigerina blowi
Synonyms: Globotruncana pura
Similar species: Differs from A. cretacea by having more spherical and inflated chbrs., more rapid chamber size increase and more lobulate perhiphery; from A. bosquensis by lower spire, fewer chmbrs., larger umbilicus, more rapid chamber size increase. [copied from Chronos database]

Type images:

Original description: Archaeoglobigerina blowi Pessagno 1967: Test trochoid, periphery lobulate; four to five globular chambers in final whorl, chambers increasing rapidly in size; tegillum not observed; wall texture smooth to rugose, periphery may have weakly developed double keel on first or second chamber of final whorl.

Entries in the Catalog of original descriptions: Archaeoglobigerina blowi;
Globotruncana pura;

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:

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.

Character matrix

test outline:Quadratecoiling axis:Low-moderatechamber arrangement:Trochospiralumbilicus:Narrow
edge view:umbilical or test sutures:Moderately depressedspiral sutures:Moderately depressedshell porosity:
wall texture:Moderately muricateaperture:Umb.-extraumbilicalaperture border:Thick porticusaccessory apertures:None
periphery:Imperforate bandumb chamber shape:Inflatedsp chbr shape:Inflatedperiph margin shape:Moderately rounded
umb depth:Shallowdiameter mm:0.39width mm:breadth mm:0.21
final-whorl chambers:4.5-5.5

References:

Pessagno, E.A., Jr., (1967). Upper Cretaceous planktonic foraminifera from the western Gulf Coastal Plain. Palaeontograph. Americana, 5: 245-445.


Archaeoglobigerina blowi compiled by the pforams@mikrotax project team viewed: 29-5-2017

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