pforams@mikrotax - Planoglobulina


Classification: pf_mesozoic -> Heterohelicidae -> Planoglobulina
Sister taxa: Heterohelix, Spiroplecta ⟩⟨ Braunella, Hendersonites, Huberella, Laeviheterohelix, Planoheterohelix, Protoheterohelix, Pseudoguembelina, Pseudotextularia ⟩⟨ Planoglobulina, Ventilabrella, Gublerina, Praegublerina, Sigalia, Racemiguembelina ⟩⟨ Lunatriella, Rectoguembelina, Zeauvigerina
Daughter taxa (time control age-window is: 0-800Ma)
Planoglobulina acervulinoides

Planoglobulina brazoensis

Planoglobulina browni

Planoglobulina carseyae

Planoglobulina manuelensis

Planoglobulina multicamerata

Planoglobulina riograndensis

Planoglobulina sp.
Specimens which cannot be assigned to established species


Citation: Planoglobulina Cushman 1927
Rank: Genus
Basionym: Guembelina acervulinoides
Type species: Guembelina acervulinoides Egger, 1902

Taxonomic discussion:
A neotype (USNM 170316) was designated for Planoglobulina acervulinoides (Egger) from the type locality by S. E. Martin, 1972 (*2051), p. 81.

Original description: Test with the earliest chambers in the microspheric form planospiral, followed by a series arranged biserially and in the adult by a series ofglobular chambers spread out fan shaped or even partially extending back toward the earlier chambers on either side, the later chambers in a single plane; wall calcareous, perforate.

Entries in the Catalog of original descriptions: Planoglobulina

Distinguishing features:
Parent taxon (Heterohelicidae): Aperture symmetrical, ranging from a low slit to a high arch at the base of the final chamber, becoming terminal in uniserial taxa.
This taxon: Test flabelliform, biserial stage followed by a proliferation of chambers in the same plane. Medium to coarse costae.

Morphology: Test flabelliform, early biserial stage with rapidly enlarging chambers followed by a proliferation of chambers in the same plane, chambers inflated, subglobular, sutures distinct, depressed; wall calcareous, hyaline, perforate, surface with medium to coarse but discontinuous longitudinal costae that parallel the margins of the chambers, lateral cameral flanges with bordering rims may merge and become continuous ridges on the later chambers; arched basal apertures in the adult commonly at both sides of the multiseriate chambers.

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 Santonian Stage (83.64-86.26Ma, base in Santonian stage). Data source: Total of range 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


Planoglobulina compiled by the pforams@mikrotax project team viewed: 27-10-2021

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