Daughter taxa (time control age-window is: 0-800Ma)![]() | ||||
| Repagulum parvidentatum Small, elliptical placoliths with monocyclic distal shield with numerous, narrow elements and central-area spanned by ~20 radial bars. In LM the coccoliths are distinctive but inconspicuous with low birefringence, "flaring" image. | ||||
| Repagulum sp. Specimens not identified to species level | ||||
Distinguishing features:
Parent taxon (placoliths inc sedis):
This taxon: Placoliths with monocyclic distal shield with numerous, narrow elements and central-area spanned by ~20 radial bars. In LM the coccoliths are distinctive but inconspicuous with low birefringence, "flaring" image.
Farinacci & Howe catalog pages:
Repagulum *
| LITHS: placolith, elliptical, CA: grill, CROSS-POLARS: rim-unicyclic, R-prominent, |
| Lith size: 3->5µm; Data source notes: size range of included species |
Geological Range:
Last occurrence (top): at top of Maastrichtian Stage (100% up, 66Ma, in Danian stage). Data source: Total of ranges of the species in this database
First occurrence (base): within BC7 zone (131.54-132.40Ma, base in Hauterivian stage). Data source: Total of ranges of species in this database
Plot of occurrence data:
Bown, P. R., Rutledge, D. C., Crux, J. A. & Gallagher, L. T. (1998). Lower Cretaceous. In, Bown, P. R. (ed.) Calcareous Nannofossil Biostratigraphy. British Micropalaeontological Society Publication Series . 86-131. gs O Deflandre, G. & Fert, C. (1954). Observations sur les coccolithophoridés actuels et fossiles en microscopie ordinaire et électronique. Annales de Paléontologie. 40: 115-176. gs Forchheimer, S. (1972). Scanning electron microscope studies of Cretaceous coccoliths from the Köpingsberg Borehole No. 1, SE Sweden. Sveriges Geologiska Undersökning, Series C. #668, 65: 1-141. gs OReferences:

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Repagulum compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 16-1-2026
Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=10993 Go to Archive.is to create a permanent copy of this page - citation notes |
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