Distinguishing features: Calcidiscus species with small coccoliths (3-6µm) with wide central opening (opening width > shield width)
Original description: Diagnosis: Small, strictly circular Calcidiscus whose diameter of the central opening is always greater than the width of the shields.
Description: This small species (3-6μm) has a non-birefringent distal shield, a tube cycle and a birefringent monocyclic proximal shield. The diameter of the central area is always greater than the width of the shield.
Farinacci & Howe catalog pages: Calcidiscus salomonii *Search data:
|Tags||LITHS: placolith, circular, CA: vacant, |
CSPH: spherical, equant, monomorphic, V-UNITS: distal shield, tube, V-prominent, R-UNITS: prox shield, R-prominent, DETAILS: isogyres oblique, rim-unicyclic,
|Metrics||Lith size: 3->6µm; |
Last occurrence (top): within NN11 zone (5.59-8.29Ma, top in Messinian stage). Data source: da Gama & Varol (2013)
First occurrence (base): within NN6 zone (11.90-13.53Ma, base in Serravallian stage). Data source: da Gama & Varol (2013)
Plot of occurrence data:
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