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Hayella
Cenozoic Taxa
Hayella situliformis Gartner, 1969
Edited by Lyndsey on Thu, 10/03/2011 - 15:07Hayella situliformis Gartner, 1969
Description: Medium-sized circular placolith coccoliths with a wide, open central area and highly birefringent tube cycle. Shield elements are distinct and show obliquity.
Remarks:
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- 77 reads
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Neogene: Hayella
Paleogene: Hayella situliformis
Hayella simplex Bown & Dunkley Jones, 2006
Edited by Lyndsey on Thu, 10/03/2011 - 15:06Hayella simplex Bown & Dunkley Jones, 2006
Description: Medium-sized (5-7 µm) circular placoliths with an open, vacant central-area. The shield elements are distinct and show obliquity. The shield image is brighter towards the inner edge.
Remarks:
Holotype: Paratype:
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- 74 reads
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Neogene: Hayella
Paleogene: Hayella simplex
Hayella Gartner, 1969
Submitted by Jeremy Young on Fri, 06/02/2009 - 12:13- Login or register to post comments
- 68 reads
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Hayella? gauliformis Troelsen & Quadros, 1971
Submitted by Jeremy Young on Fri, 06/02/2009 - 12:13- Login or register to post comments
- 139 reads
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Neogene: Hayella
Paleogene: Hayella? gauliformis
Hayella challengeri
Edited by Lyndsey on Thu, 10/03/2011 - 13:29
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:
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.
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- 296 reads
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Neogene: Hayella; Hayella challengeri
Hayella
Edited by Lyndsey on Wed, 09/03/2011 - 10:21Genus Hayella Gartner, 1969
Description:
Remarks: Hayella was desribed fom the Eocene and assignment of the Miocene species H. challengeri to it is tentative.
Type species: Hayella situliformis
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- 969 reads
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Neogene: Hayella
Paleogene: Hayella situliformis
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