Pontosphaera rorsa

(Kamptner, 1967) Varol, 2025a Jun 13, 2025

Set number: 1900

  • Pontosphaera rorsa VR 4630 1
  • Pontosphaera rorsa VR 4626 2
  • Pontosphaera rorsa VR 4627 3
  • Pontosphaera rorsa VR 4638 4
  • Pontosphaera rorsa VR 4624 5
  • Pontosphaera rorsa VR 4628 6
  • Pontosphaera rorsa VR 4629 7
  • Pontosphaera rorsa VR 4637 8
  • Pontosphaera rorsa VR 4632 9
  • Pontosphaera rorsa VR 4633 10
  • Pontosphaera rorsa VR 4634 11
  • Pontosphaera rorsa VR 4636 12
    10µm
DSDP Leg 23, Site 229A, Red Sea

Set number: 1899

  • Pontosphaera rorsa 1220 15 1
    10µm
Adana Basin, Turkey
Final Epithet
Pontosphaera rorsa (Kamptner, 1967) Varol, 2025a
Basionym

Discolithus rorsus Kamptner, 1967

Remarks

Pontosphaera rorsa exhibits uniform interference colours in XPL, resulting from the similar height of the wall and distal cover over the proximal plate. The proximal plate is characterised by large square pores arranged in two to three complete concentric cycles, with additional randomly arranged pores possibly present in the centre. The species displays first-order white interference colours, inclined extinction lines, and length-fast (−) elongation in the plan view.

References

Kamptner, E. 1967. Kalkflagellaten - Skelettreste aus Tiefseeschlamm des Südatlantischen Ozeans. Annalen des Naturhistorischen Museums in Wien. 71: 117-198.

Varol, O. 2025a. A practical guide to optical studies of calcareous nannofossils. Grzybowski Foundation Special Publication. 29: 1-222

Taxonomy
Pontosphaera
Biostratigraphy
  • Phanerozoic
    • Cenozoic
      • Quaternary
        • Holocene
          • -
            • Recent
      • Neogene
        • Pliocene
          • Early Pliocene
            • Zanclean
Stratigraphic Range
Zanclean - Recent
Age (Ma)
5.33? - 0.00
Zone(s)
NN12 - NN21
Holotype
Pontosphaera rorsa 1220 15

Discolithus rorsus Kamptner, 1967

Holocene?

Station 338 of the Challenger Expedition, South Atlantic Ocean