Neochiastozygus chiastus

(Bramlette & Sullivan, 1961) Perch-Nielsen, 1971d Jun 14, 2025

Set number: 1923

  • Neochiastozygus chiastus 25282 1
  • Neochiastozygus chiastus 25281 2
  • Neochiastozygus chiastus 25278 3
  • Neochiastozygus chiastus 25286 4
  • Neochiastozygus chiastus 25283 5
  • Neochiastozygus chiastus 25280 6
  • Neochiastozygus chiastus 25279 7
  • Neochiastozygus chiastus 25284 8
    10µm
DSDP Leg 36, Site 327A, The Maurice Ewing Bank, Falkland Plateau

Set number: 1922

  • Neochiastozygus chiastius 23328 1
  • Neochiastozygus chiastius 23330 2
  • Neochiastozygus chiastius 23333 3
  • Neochiastozygus chiastius 23336 4
  • Neochiastozygus chiastius 23329 5
  • Neochiastozygus chiastius 23331 6
  • Neochiastozygus chiastius 23334 7
  • Neochiastozygus chiastius 23335 8
    10µm
DSDP Leg 36, Site 327A, The Maurice Ewing Bank, Falkland Plateau
Final Epithet
Neochiastozygus chiastus (Bramlette & Sullivan, 1961) Perch-Nielsen, 1971d
Basionym

Zygodiscus chiastus Bramlette & Sullivan, 1961

Remarks

A species of Neochiastozygus features a diagonal cross with a straight arm aligned in the NW-SE direction, while a sigmoid (slightly dislocated) arm is aligned in the NE-SW direction on the distal view. The arms are thickened at their termini.

References

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

Perch-Nielsen, K. 1971d. Neue Coccolithen aus dem Paläozän von Dänemark, der Bucht von Biskaya und dem Eozän der Labrador See. Bulletin of the Geological Society of Denmark 21: 51-66.

Taxonomy
Neochiastozygus
Biostratigraphy
  • Phanerozoic
    • Cenozoic
      • Paleogene
        • Eocene
          • Early Eocene
            • Ypresian
        • Paleocene
          • Late Paleocene
            • Thanetian
Stratigraphic Range
Thanetian - Ypresian
Age (Ma)
59.24? - 48.07?
Zone(s)
NP8 - NP12
Holotype
Neochiastozygus chiastus 25278

Zygodiscus chiastius Bramlette & Sullivan, 1961

Late Paleocene

Lodo section, northwestern Fresno County, central California, USA