Taxonomy:
Distinguishing features: Medium sized holococcolith comprising several distinct crystallographic blocks that change appearance on rotation in XPL. At 0° six blocks are visible, four major quadrants, alternating dark and light, delineated by axial sutures, and one small block at each end. At 5° the four quadrants are bright and a small pore is visible in the centre. At 45° the coccolith is bright and crossed by diagonal extinction lines.
Farinacci & Howe catalog pages: L. arcanus *
Search data:Tags | LITHS: holococcolith, elliptical, polygonal, hollow, CROSS-POLARS: R-prominent, |
Metrics | Lith size: 4.6->5.5µm; Data source notes: lith size from OD |
Geological Range:
Last occurrence (top): within NP15c subzone (42.87-44.12Ma, top in Lutetian stage). Data source: Bown 2005
First occurrence (base): within NP15b subzone (44.12-45.49Ma, base in Lutetian stage). Data source: Bown 2005
Plot of occurrence data:
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Lanternithus arcanus compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 28-2-2021
Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=789 Go to Archive.is to create a permanent copy of this page - citation notes |