Distinguishing features: Large to very large (~>9µm), broadly elliptical reticulofenestrids with broad tube and narrow central area that can be distinctly quadrate or lens-shaped.
BownNewsam 2017 pl01 44.JPG
BownNewsam 2017 pl01 45.JPG
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ShamrockWatkins2012-pl6-fig4.jpg
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TypeFig Reticulofenestra hillae.jpgTaxonomy:
Farinacci & Howe catalog pages: Reticulofenestra hillae *
Distinguishing features: Large to very large (~>9µm), broadly elliptical reticulofenestrids with broad tube and narrow central area that can be distinctly quadrate or lens-shaped.
Search data:| Tags | LITHS: placolith, elliptical, CA: grill, vacant, CSPH: spherical, monomorphic, V-UNITS: none, R-UNITS: all, c-str, distal shield, prox shield, tube, DETAILS: ca_conjunct, isogyres kinked, isogyres oblique, rim-unicyclic, |
| Metrics | Lith size: 9->14µm; Sources: |
Geological Range:
Notes: Particularly conspicuous in the Eocene/Oligocene boundary interval and lower Oligocene (Zones NP19/20-NP22) but also present in the Eocene (Zones NP17-NP19/20) (Bown & Dunkley Jones, 2012)
Last occurrence (top): within NP22 zone (32.02-32.92Ma, top in Rupelian stage). Data source: Bown & Dunkley Jones, 2012
First occurrence (base): within NP17 zone (37.32-40.40Ma, base in Bartonian stage). Data source: Bown & Dunkley Jones, 2012
Plot of occurrence data:
Bown, P.R. & Dunkley Jones, T., (2012). Calcareous nannofossils from the Paleogene equatorial Pacific (IODP Expedition 320 Sites U1331-1334). Journal of Nannoplankton Research, 32(2): 3-51. Bukry, D. & Percival, S.F., (1971). New Tertiary calcareous nannofossils. Tulane Studies in Geology and Paleontology, 8: 123-146.References:
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Reticulofenestra hillae compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 15-11-2018
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