arrayname: original
Distinguishing features:
Parent taxon (Placozygus): Murolith with distal/outer-cycle that shows little or no imbrication and central area spanned by transverse bars; rim exhibits spiral interference pattern.
This taxon: Small Placozygus (holotype 4.4 µm) with crossbar dark in xpl and almost filling the central area
Taxonomy:
Farinacci & Howe catalog pages: P. banneri *
Distinguishing features:
Parent taxon (Placozygus): Murolith with distal/outer-cycle that shows little or no imbrication and central area spanned by transverse bars; rim exhibits spiral interference pattern.
This taxon: Small Placozygus (holotype 4.4 µm) with crossbar dark in xpl and almost filling the central area
Morphology:
Size:
LITHS: murolith, elliptical, CA: bar, process, ca_disjunct, CROSS-POLARS: R-prominent, V-prominent, rim-bicyclic, |
Lith size: 3.5->5µm; Data source notes: holotype and extended |
Geological Range:
Last occurrence (top): within Early Maastrichtian Substage (70.10-72.17Ma, top in Maastrichtian stage). Data source: Lees 2007 (original description)
First occurrence (base): within Late Campanian Substage (72.17-76.20Ma, base in Campanian stage). Data source: Lees 2007 (original description)
Plot of occurrence data:
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Placozygus banneri compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 25-3-2025
Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=10909 Go to Archive.is to create a permanent copy of this page - citation notes |
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