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Hayella challengeri

Edited by Lyndsey on Thu, 10/03/2011 - 14:29

Hayella challengeri (Muller, 1974) Theodoridis, 1984 [Nannocorbis]

Description: Tubular murolith, with proximal and distal flanges, medium sized (Muller 1974 gives the size in the text as 3.5-4μm but according to the scale bar the holotype is 7μm across).

Remarks: Superficially similar to U. rotula in plan view, but easily distinguished by through-focusing. N.B. Assignment to Hayella is uncertain since structure of the, Eocene, type species H. situliformis, is unclear. H. challengeri appears structurally similar to Ochrosphaera neapolitana.

Original description:

Nannocorbis challengeri 020290.jpg

5-16challengeri.JPG 5-17challengeri.JPG

Synonym: Hayella aperta Theodoridis, 1984 - described as similar to H. challengeri but larger. However, the the holotype of H. aperta is only 8.5μm across vs 7μm for H. challengeri.

Geological Time Data
Geological Time Periods: 
NN12
NN 1
Biblio Reference: 
Young, JR.  1998.  Neogene. Calcareous nannofossil biostratigraphy. :225-265.
Notes on occurrence information: 

Questions occur about the range. Common in NN4 to 6.

Scratchpads developed and conceived by: Vince Smith, Simon Rycroft, Dave Roberts, Ben Scott...