arrayname: original
Taxonomy:
Distinguishing features:
Parent taxon (Pontosphaera): Coccoliths are muroliths, central area with variable number of perforations. V-units form narrow imbricate outer wall, R-units form inner wall and central-area.
This taxon: Pontosphaera with central field of irregularly arranged, variable size, pores.
Farinacci & Howe catalog pages: D. enormis *
Search data:
LITHS: murolith, elliptical, CA: ca_conjunct, pores, CROSS-POLARS: V-prominent, R-prominent, rim-bicyclic, |
Lith size: 7->10µm; Data source notes: lith size from OD & illustrated specimens |
Geological Range:
Last occurrence (top): within Oligocene Epoch (23.03-33.89Ma, top in Chattian stage). Data source: [JRY rough estimate]
First occurrence (base): within Eocene Epoch (33.89-55.96Ma, base in Ypresian stage). Data source: [JRY rough estimate]
Plot of occurrence data:
Bown, P. R. & Newsam, C. (2017). Calcareous nannofossils from the Eocene North Atlantic Ocean (IODP Expedition 342 Sites U1403–1411). Journal of Nannoplankton Research. 37(1): 25-60. gs O Jones, A. P. & Dunkley Jones, T. (2020). Middle Eocene to Early Oligocene calcareous nannofossils from the Nanggulan Formation, Java, Indonesia. Journal of Nannoplankton Research. 38(1): 57-79. gs Locker, S. (1967c). Neue, statigraphisch wichtige Coccolithophoriden (Flagellata) aus dem norddeutschen Alttertiar. Monatsberichte der Deutschen Akademie der Wissenschaften zu Berlin. 9(9-10): 758-769. gs Perch-Nielsen, K. (1984). Validation of new combinations. INA Newsletter. 6(1): 42-46. gs Varol, O. (1998). Palaeogene. In, Bown, P. R. (ed.) Calcareous Nannofossil Biostratigraphy. British Micropalaeontological Society Publication Series . 200-224. gs References:
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Pontosphaera enormis compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 20-3-2025
Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=1071 Go to Archive.is to create a permanent copy of this page - citation notes |
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