Set number: 1644

  • Helicosphaera euphratis VR 028454 1
  • Helicosphaera euphratis VR 028453 2
  • Helicosphaera euphratis VR 028446 3
  • Helicosphaera euphratis VR 028449 4
  • Helicosphaera euphratis VR 028455 5
  • Helicosphaera euphratis VR 028452 6
  • Helicosphaera euphratis VR 028447 7
  • Helicosphaera euphratis VR 028448 8
  • Helicosphaera euphratis VR 028450 9
  • Helicosphaera euphratis VR 028451 10
  • Helicosphaera euphratis VR 028462 11
  • Helicosphaera euphratis VR 028461 12
  • Helicosphaera euphratis VR 028465 13
  • Helicosphaera euphratis VR 028464 14
  • Helicosphaera euphratis VR 028463 15
  • Helicosphaera euphratis VR 028466 16
  • Helicosphaera euphratis VR 028457 17
  • Helicosphaera euphratis VR 028458 18
  • Helicosphaera euphratis VR 028459 19
  • Helicosphaera euphratis VR 028456 20
    10µm
DSDP Leg 25, Site 242, Mozambique Channel (Davie Ridge), Indian Ocean

Set number: 319

  • Helicosphaera euphratis 367 1
  • Helicosphaera euphratis 368 2
    10µm
Helicosphaera euphratis, Late Oligocene, DSDP Leg 25, Site 242, Mozambique Channel (Davie Ridge), Indian Ocean
Final Epithet
Helicosphaera euphratis Haq, 1966
Basionym

Helicosphaera euphratis Haq, 1966

Synonyms

Helicosphaera parallela Bramlette & Wilcoxon, 1967

Description

Large helicolith having a Type III (Helicosphaera carteri type), an expanded flange termination and the central area with multi-segmented disjunct plate filling the entire central opening.

Remarks

Helicosphaera euphratis differs from Helicosphaera intermedia Martini (1965) and Helicosphaera leesiae da Gama & Varol (2013) by having a multi-segmented disjunct plate instead of a disjunct bar in the central area.

References

Bramlette, M. N. & Wilcoxon, J. A., (1967): Middle Tertiary calcareous nannoplankton of the Cipero section, Trinidad, W.I. - Tulane Studies in Geology and Paleontology. 5: 93-131.

da Gama, R. O. B. P. & Varol, O., (2013): New Late Oligocene to Miocene Species. - Journal of Nannoplankton Research. 33(1): 1-12.

Haq, B. U., (1966): Electron microscope studies on some upper Eocene calcareous nannoplankton from Syria. - Stockholm Contributions in Geology. 15: 23-37.

Martini, E., (1965): Mid-Tertiary calcareous nannoplankton from Pacific deep-sea cores. - Colston Papers. 17: 393-411.