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Umbilicosphaera sibogae

Edited by Lyndsey on Thu, 10/03/2011 - 10:16

Umbilicosphaera sibogae (Weber-van Bosse 1901) Gaarder 1970 [Coccosphaera]

Description: Coccospheres large (20-30 µm) usually containing 2-4 cells. Liths circular, 3-7 µm; central opening broad; proximal shield monocyclic, flat, wider than distal shield.

Remarks:

Original description:

Cat080495 copy.jpgCat080496 copy.jpg

5-1sibogae.JPG 5-2sibogae.JPGUmbilicosphaeraA.JPGUmbilicosphaeraB.JPG

U_sib_181-84.JPGU_sib_240-09a.JPGU_sib_186-17.JPG

Synonyms:

  • Umbilicosphaera sibogae var. sibogae (Weber-van Bosse, 1901) Gaarder, 1970
  • U. mirabilis Lohmann 1902. NB The type specimen of U. mirabilis is a typical U. sibogae but many authors applied the name to U. foliosa.
Geological Time Data
Geological Time Periods: 
Holocene
NN15
Biblio Reference: 
Young, JR.  1998.  Neogene. Calcareous nannofossil biostratigraphy. :225-265.
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