Biscutum bellis

Noël, 1970 Jan 13, 2026

Set number: 2758

  • Biscutum bellis 4786 1
  • Biscutum bellis 4787 2
    10µm
Biscutum bellis, Middle Campanian, Arabian Peninsula (The specific location cannot be disclosed)

Set number: 2766

  • Biscutum cf tredenale 4733 1
  • Biscutum clarascutum 4734 2
    10µm
Biscutum bellis, Middle Campanian, Arabian Peninsula (The specific location cannot be disclosed)
Final Epithet
Biscutum bellis Noël, 1970
Basionym

Biscutum bellis Noël, 1970

Holotype

Calculated size: 4.30 µm; number of segments in the distal shield: 22

Optical Properties

In plan view under XPL, the distal shield is in constant extinction because the optic axis (c-axis) is perpendicular to the microscope stage, whereas the proximal shield and tube cycle display a white interference colour and exhibit length-fast (–) elongation.

Remarks

The circular placolith has distal and proximal shields of equal size, each composed of approximately 20-30 segments, and a tube cycle.

References

Noël, D. 1970. Coccolithes Crétacés: La Craie Campanienne du Bassin de Paris. - Éditions du Centre National de la Recherche Scientifique, Paris. 1-129

Taxonomy
Biscutum
Biostratigraphy
  • Phanerozoic
    • Mesozoic
      • Cretaceous
        • Late Cretaceous
          • Senonian
            • Campanian
              • Late Campanian
              • Early Campanian
Stratigraphic Range
Early Campanian - Late Campanian
Age (Ma)
83.65? - 72.17?
Holotype
Biscutum bellis 4786

Discorhabdus bellis Noël, 1970

Late Campanian

Arpenty, Essonne, France