Daughter taxa (time control age-window is: 0-800Ma) | ||||
Racemiguembelina fructicosa | ||||
Racemiguembelina powelli | ||||
Racemiguembelina sp. Specimens which cannot be assigned to established species |
Taxonomy
Original description: Diagnosis: Test calcareous, conical in shape; rarely planispiral in the early stage, later biserial, increasing regularly and equally in thickness and breadth, finally proliferated with a varying number of additional globular chambers, the last of which form a crown at the top of the test and are provided with a series of arcuate, basal apertures. No spiral arrangement of the adult chambers is evident. Ornamentation consists of longitudinally developed costae.
Entries in the Catalog of original descriptions: Racemiguembelina
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 initially biserial, becomes conical with proliferation of multiple globular chambers forming a crown at top of test
Morphology:
Geological Range:
Last occurrence (top): at top of P. hariaensis zone (100% up, 66.4Ma, in Maastrichtian stage). Data source: Total of ranges of the species in this database
First occurrence (base): within G. gansseri zone (71.73-73.80Ma, base in Campanian stage). Data source: Total of ranges 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:
Racemiguembelina compiled by the pforams@mikrotax project team viewed: 10-12-2024
Short stable page link: https://mikrotax.org/pforams/index.php?id=110481 Go to Archive.is to create a permanent copy of this page - citation notes |
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