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 |
Taxonomy
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:
Geological Range:
Last occurrence (top): near top of Maastrichtian Stage (94% up, 66.4Ma, in Maastrichtian stage). Data source: Total of range of species in this database
First occurrence (base): in upper part of Santonian Stage (79% up, 84.2Ma, 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. gsReferences:
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Planoglobulina compiled by the pforams@mikrotax project team viewed: 25-9-2023
Short stables page link: https://mikrotax.org/pforams/index.php?id=110390 Go to Archive.is to create a permanent copy of this page - citation notes |
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