Pontosphaera rimosa

(Bramlette & Sullivan, 1961) Roth & Thierstein, 1972 Jun 13, 2025
T rimosus 2

Set number: 4508

  • Pontosphaera rimosa 49760 1
  • Pontosphaera rimosa 49761 2
  • Pontosphaera rimosa 49764 3
  • Pontosphaera rimosa 49759 4
  • Pontosphaera rimosa 49762 5
  • Pontosphaera rimosa 49763 6
    10µm
Pontosphaera rimosa, Thanetian, Santos Basin, Brazil
Final Epithet
Pontosphaera rimosa (Bramlette & Sullivan, 1961) Roth & Thierstein, 1972
Basionym

Discolithus rimosus Bramlette & Sullivan, 1961

Remarks

Pontosphaera rimosa consists of a wall and a proximal plate, with a thin distal cover pierced by a single large pore. The species exhibits dextrally inclined extinction lines, with a typical extinction angle of approximately 65°

References

Roth, P. H. & Thierstein, H. R. 1972. Calcareous nannoplankton: Leg 14 of the Deep Sea Drilling Project. Initial Reports of the Deep Sea Drilling Project. 12: 546-559.

Bramlette, M. N. & Sullivan, F. R. 1961. Coccolithophorids and related nannoplankton of the Early Tertiary in California. Micropaleontology 7(2): 129-188.

Taxonomy
Pontosphaera
Uncategorised
Biostratigraphy
  • Phanerozoic
    • Cenozoic
      • Paleogene
        • Eocene
          • Middle Eocene
            • Lutetian
        • Paleocene
          • Late Paleocene
            • Thanetian
Stratigraphic Range
Thanetian - Lutetian
Zone(s)
NP8 - NP15
Age (Ma)
59.24? - 41.03?
Holotype
T rimosus default

Discolithus rimosus Bramlette & Sullivan, 1961

Late Paleocene

Lodo section, northwestern Fresno County, central California, USA