Specimens which cannot be assigned to established species
| Daughter taxa (time control age-window is: 0-800Ma) | ||||
| | | Rugoglobigerina hexacamerata | |
| | | Rugoglobigerina macrocephala | |
| | Rugoglobigerina milamensis | ||
| | | Rugoglobigerina pennyi | |
| | | Rugoglobigerina rugosa | |
| | | Rugoglobigerina spinosa | |
| Rugoglobigerina sp. Specimens which cannot be assigned to established species | ||||
Taxonomy
Original description: Test either Hantkenina-like or distinctly Globigerina- like, almost planispiral to trochoidal. Chambers of Hantkenina type with axially situated spines, those of Globigerina type rounded peripherally, truncate toward umbilicus. Sutures straight to slightly curved in direction of coiling. Apertures large, arcuate, directed toward umbilicus, occasionally with liplike projections. Umbilicus subcircular, as a rule large, deep, with covering plate. Surface ornamented by rugosities of various size and type, either distributed irregularly or arranged in rows radiating from a central point on the surface toward the aperture (meridional pattern).
Entries in the Catalog of original descriptions: Rugoglobigerina
Distinguishing features:
Parent taxon (Rugoglobigerinidae): Test trochospiral, chambers inflated, periphery rounded, not carinate; wall with pustules, costellae, or other rugosities; aperture umbilical, with portici or tegilla.
This taxon: Test in low to flat trochospiral coil of rapidly enlarging globular chambers, biconvex, umbilicate, umbilicus occupying up to one-half the test diameter, periphery rounded, noncarinate; wall calcareous, perforate, surface with pustules, rugosities, and costellae in a meridional pattern; primary aperture interiomarginal, umbilical, with prominent tegilla and large proximal and distal accessory apertures.
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): at base of Campanian Stage (0% up, 83.6Ma, in Campanian 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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Rugoglobigerina compiled by the pforams@mikrotax project team viewed: 31-3-2023
Short stables page link: https://mikrotax.org/pforams/index.php?id=110499 Go to Archive.is to create a permanent copy of this page - citation notes |
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