Set number: 227

  • Helicosphaera paleocarteri 26533 1
  • Helicosphaera paleocarteri 26529 2
  • Helicosphaera paleocarteri 26532 3
  • Helicosphaera paleocarteri 26538 4
  • Helicosphaera paleocarteri 26534 5
  • Helicosphaera paleocarteri 26530 6
  • Helicosphaera paleocarteri 26531 7
  • Helicosphaera paleocarteri 26535 8
    10µm
Helicosphaera paleocarteri, Middle Miocene, Malta

Set number: 228

  • Helicosphaera distincta 29847 1
  • Helicosphaera distincta 29846 2
  • Helicosphaera distincta 29843 3
  • Helicosphaera distincta 29852 4
  • Helicosphaera distincta 29848 5
  • Helicosphaera distincta 29845 6
  • Helicosphaera distincta 29844 7
  • Helicosphaera distincta 29853 8
    10µm
Helicosphaera paleocarteri, Middle Miocene, Malta

Set number: 447

  • Helicosphaera paleocarteri 930 1 1
  • Helicosphaera paleocarteri 930 6 2
Helicosphaera paleocarteri, Middle Miocene, Malta
Final Epithet
Helicosphaera paleocarteri Theodoridis, 1984
Basionym

Helicosphaera paleocarteri Theodoridis, 1984

Remarks

A helicolith characterised by a Type III (Helicosphaera carteri type) blanket, an expanded flange termination, and a central area containing two small round pores positioned off the axial suture. Helicosphaera paleocarteri differs from Helicosphaera dyotrypes in pore alignment; in Helicosphaera paleocarteri, both pores are consistently aligned off the longitudinal suture, whereas in Helicosphaera dyotrypes, one pore is always positioned on the suture while the other is off it. Helicosphaera paleocarteri exhibits inclined extinction angles of approximately 53° on the blanket on the distal side and displays length-fast (−) elongation.

References

Kamptner, E., 1954. Untersuchungen über den Feinbau der Coccolithen. Archiv für Protistenkunde 100, 1-90.

Theodoridis, S., 1984. Calcareous nannofossil biostratigraphy of the Miocene and revision of the helicoliths and discoasters. Utrecht Micropaleontological Bulletin. 32, 1-271.

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

Wallich, G. C., 1877. Observations on the coccosphere. Annals and Magazine of Natural History 19, 342-350.