Reticulofenestra hillae


Classification: Coccolithophores -> Isochrysidales -> Noelaerhabdaceae -> Reticulofenestra -> R. umbilicus group -> Reticulofenestra hillae
Sister taxa: R. umbilicus, R. dictyoda, R. hillae, R. hampdenensis, R. hesslandii, R. moorei, R. circus, R. circus var. lata, R. wadeae, R. maceria Shafik 1989, R. oamaruensis,

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.


Taxonomy:

Citation: Reticulofenestra hillae Bukry & Percival, 1971
Rank: Species
Notes & discussion: Considered a junior synonym of R. umbilicus by some (e.g., Backman and Hermelin, 1986).

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:
TagsLITHS: 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,
MetricsLith size: 9->14µm;
Sources:
The morphological data given here can be used on the advanced search page. See also these notes

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:

  • Histogram - Neptune occurrence data from DSDP and ODP proceedings. Pale shading <50 samples in time bin. Interpret with caution & read these notes
  • Note to users in China - the diagram may not plot unless you use a VPN since I use google services on the website. If this is a problem please contact me 谢谢.
  • Taxon plotted: Reticulofenestra hillae, synonyms included - Reticulofenestra samodurovi/hillae; space-time plot :: Samples map :: Parent: R. umbilicus group

    References:

    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.GS

    Bukry, D. & Percival, S.F., (1971). New Tertiary calcareous nannofossils. Tulane Studies in Geology and Paleontology, 8: 123-146.GS

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    Reticulofenestra hillae compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 20-4-2019

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