Taxonomy:
Distinguishing features: Small narrow sphenolith with square base, comprising equidimensional quadrants, and tapering monocrystalline spine that is dark at 0° and bright at 45°.
Farinacci & Howe catalog pages: S. richteri *
Size: Holotype length 4.3 microns
Tags | LITHS: nannolith-radiate, circular, cylindrical, CA: process, CROSS-POLARS: V-prominent, R-prominent, |
Metrics | Lith size: 3->5µm; Data source notes: lith height from OD |
Geological Range:
Last occurrence (top): within NP16 zone (40.40-42.87Ma, top in Bartonian stage). Data source: Bown & Dunkley Jones, 2012
First occurrence (base): within NP16 zone (40.40-42.87Ma, base in Lutetian stage). Data source: Bown & Dunkley Jones, 2012
Plot of occurrence data:
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Sphenolithus richteri compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 23-1-2021
Short stable page link: http://mikrotax.org/Nannotax3/index.php?id=1318 Go to Archive.is to create a permanent copy of this page - citation notes |