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BramlSull61pl08-11.JPGTaxonomy:
Distinguishing features: Stellate Micrantholithus with deeply indented sides and gracile, long rays.
Farinacci & Howe catalog pages: M. attenuatus * , M. aequalis * , M. inaequalis * , M. articulatus *
Search data:| Tags | LITHS: nannolith-radiate, pentagonal, star-shaped, CROSS-POLARS: T-prominent, |
| Metrics | Lith size: 10->30µm; Segments: 5->5; Liths per sphere: 12->12 Data source notes: lith size (diameter) from ODs & illustrated specimens; lith numbers assumed from geometry |
Geological Range:
Last occurrence (top): within NP23 zone (29.62-32.02Ma, top in Rupelian stage). Data source: [PRB rough estimate]
First occurrence (base): within NP9 zone (55.86-57.21Ma, base in Thanetian stage). Data source: Bown 2005
Plot of occurrence data:
Bown, P. R. (2005d). Palaeogene calcareous nannofossils from the Kilwa and Lindi areas of coastal Tanzania (Tanzania Drilling Project 2003-4). Journal of Nannoplankton Research. 27(1): 21-95. gs V O Bown, P. R. (2010). Calcareous nannofossils from the Paleocene/Eocene Thermal Maximum interval of southern Tanzania (TDP Site 14). Journal of Nannoplankton Research. 31(1): 11-38. gs V O Bramlette, M. N. & Sullivan, F. R. (1961). Coccolithophorids and related nannoplankton of the Early Tertiary in California. Micropaleontology. 7(2): 129-188. gs Bukry, D. & Percival, S. F. (1971). New Tertiary calcareous nannofossils. Tulane Studies in Geology and Paleontology. 8: 123-146. gs V O Martini, E. (1961). Nannoplankton aus dem Tertiär und der obersten Kreide von SW-Frankreich. Senckenbergiana Lethaea. 42: 1-32. gs Self-Trail, J. (2011). Paleogene Calcareous Nannofossils of the South Dover Bridge core, Southern Maryland (USA). Journal of Nannoplankton Research. 32(1): 1-28. gs V O Sullivan, F. R. (1964). Lower Tertiary nannoplankton from the California Coast Ranges. I. Paleocene. University of California Publications in Geological Sciences. 44: 163-227. gsReferences:
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Micrantholithus attenuatus compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 23-4-2021
Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=858 Go to Archive.is to create a permanent copy of this page - citation notes |