Blackites spinula

(Levin, 1965) Varol, n. comb. Apr 26, 2021

Set number: 1113

  • Blackites spinula VR 02888 1
  • Blackites spinula VR 02885 2
  • Blackites spinula VR 02891 3
  • Blackites spinula VR 02895 4
  • Blackites spinula VR 02889 5
  • Blackites spinula VR 02886 6
  • Blackites spinula VR 02890 7
  • Blackites spinula VR 02896 8
  • Blackites spinula VR 02894 9
  • Blackites spinula VR 02893 10
  • Blackites spinula VR 02892 11
  • Blackites spinula VR 02897 12
    10µm
Blackites spinula, Middle Eocene, DSDP Leg 39, Sites 356, Sào Paulo Plateau, South Atlantic Ocean

Set number: 1111

  • Blackites incompertus VR 02902 1
  • Blackites incompertus VR 02899 2
  • Blackites incompertus VR 02905 3
  • Blackites incompertus VR 02910 4
  • Blackites incompertus VR 02903 5
  • Blackites incompertus VR 02900 6
  • Blackites incompertus VR 02904 7
  • Blackites incompertus VR 02906 8
    10µm
Blackites cf_spinula, Middle Eocene, DSDP Leg 39, Sites 356, Sào Paulo Plateau, South Atlantic Ocean
Final Epithet
Blackites spinula (Levin, 1965) Varol, n. comb.
Basionym

Rhabdosphaera spinula Levin, 1965

Description

Species of Blackites Hay & Towe (1962) have a long and narrow distal process that gradually tapers to a point. The surface of the distal process is smooth. The inner cycles of the base are birefringent at the side view.

In the publications, this species was erroneously assigned to Blackites spinosus (Deflandre & Fert, 1954) Hay & Towe, 1962.

Remarks

Blackites spinula is identified from Blackites incompertus Roth (1970) by having a distal process that gradually tapers to a point whereas, in the latter species, the distal process slightly broadens in the middle.

References

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

Deflandre, G. & Fert, C., (1954): Observations sur les coccolithophoridés actuels et fossiles en microscopie ordinaire et électronique. - Annales de Paléontologie. 40: 115-176.

Hay, W. W. & Towe, K. M., (1962): Electron microscope examination of some coccoliths from Donzacq (France). - Eclogae Geologicae Helvetiae. 55: 497-517.

Levin, H. L., (1965): Coccolithophoridae and related microfossils from the Yazoo Formation (Eocene) of Mississippi. - Journal of Paleontology. 39(2): 265-272.

Roth, P. H., (1970): Oligocene calcareous nannoplankton biostratigraphy. - Eclogae Geologicae Helvetiae. 63: 799-881.

Taxonomy
Blackites
Biostratigraphy
  • Phanerozoic
    • Cenozoic
      • Paleogene
        • Oligocene
          • Middle Oligocene
            • Rupelian
        • Eocene
          • Middle Eocene
            • Lutetian
Stratigraphic Range
Lutetian - Rupelian
Age (Ma)
48.07? - 31.00
Holotype
Blackites spinula VR 02887

Blackites spinula Levin, 1965

Late Eocene

Yazoo Formation, Yazoo City, Mississippi, USA