Girgisia gammation

(Bramlette & Sullivan, 1961) Varol, 1989 Sep 09, 2020

Set number: 286

  • Girgisia gammation 1969 1
  • Girgisia gammation 1970 2
    10µm
Girgisia gammation, Middle Eocene, Pakistan
Final Epithet
Girgisia gammation (Bramlette & Sullivan, 1961) Varol, 1989
Basionym

Coccolithites gammation Bramlette & Sullivan, 1961

Description

Coccolithites gammation is valid according to ICN Art. 45 because originally described using ICZN codes by Bramlette & Sullivan (1961) [the Code used was clearly stated]

Remarks

Circular placolith having a central area with a very bright central plug surrounded by an equally bright double tube cycle. The distal shield is deemed, but its segments are visible, whereas the slightly smaller proximal shield is bright under polarised light.

References

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

Varol, O., (1989b): Eocene calcareous nannofossils from Sile (northwest Turkey). - Revista Española de Micropaleontología. 21: 273-320.

Taxonomy
Girgisia
Biostratigraphy
  • Phanerozoic
    • Cenozoic
      • Paleogene
        • Eocene
          • Middle Eocene
            • Lutetian
          • Early Eocene
            • Ypresian
Stratigraphic Range
Ypresian - Lutetian
Age (Ma)
54.13 - 41.03
Holotype
Girgisia gammation 1969

Coccolithites gammation Bramlette & Sullivan, 1961

Early Eocene

Lodo section, northwestern Fresno County, central California, USA