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Umbellosphaera tenuis

Mon, 04/08/2008 - 21:35 — Jeremy Young
umbellosphaera_tenuis.jpg
Citation: 
Umbellosphaera tenuis (Kamptner, 1937) Paasche in Markali and Paasche, 1955 [Coccolithus]

Description: Coccoliths convex outwards, relatively heavily calcified, with ridges on the distal surface.

Remarks: This form is substantially more robust than U. irregularis and is much more common in the fossil record.

Range: NN15? to 21

Synonyms:

  • Ellipsodiscoaster lidzii Boudreaux and Hay, 1969
  • Discoaster murrayi Black & Barnes 1961 

5-30tenuis.JPGUmb_ten_120-25.JPGUmb_ten_113-21.JPG

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