Sphenolithus conspicuus


Classification: Coccolithophores -> Discoasterales -> Sphenolithaceae -> Sphenolithus -> S. conspicuus group -> Sphenolithus conspicuus
Sister taxa: S. anarrhopus, S. conspicuus, S. editus, S. rioi, S. villae,

Taxonomy:

Citation: Sphenolithus conspicuus Martini, 1976
Rank: Species
Notes & discussion: Similar to Sphenolithus villae but smaller, with longer upper quadrant extensions and shorter lower quadrants.

Distinguishing features: Medium sized (height 5.0-6.7 µm) narrow sphenolith with a tall spine that is dark at 0° and conspicuously bright at 45°. Tall base with long upper quadrants that form part of the spine.

Farinacci & Howe catalog pages: Sphenolithus conspicuus *

Search data:
TagsLITHS: nannolith-radiate, N: 3D-radiate, conical, circular, cylindrical, RIM: tiered, CA: process, PROCESS: length-fast, monocrystalline, spine,
CSPH: not known, V-UNITS: none, R-UNITS: lower-tier, spine, R-prominent, DETAILS: isogyres radial,
MetricsLith size: 5->10µm;
Sources: lith height from OD
The morphological data given here can be used on the advanced search page. See also these notes

Geological Range:
Last occurrence (top): within NP11 zone (53.70-54.17Ma, top in Ypresian stage). Data source: Bown 2005
First occurrence (base): within NP11 zone (53.70-54.17Ma, base in Ypresian stage). Data source: Bown 2005

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: Sphenolithus conspicuus, synonyms included - Sphenolithus conspicuous; Sphenolithus conspicuus;
  • space-time plot :: Samples map :: Parent: S. conspicuus 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 :: view :: open

    Bown, P. R. (2005). Palaeogene calcareous nannofossils from the Kilwa and Lindi areas of coastal Tanzania (Tanzania Drilling Project 2003-4). Journal of Nannoplankton Research. 27(1): 21-95. gs :: view :: open

    Martini, E. (1976). Cretaceous to Recent calcareous nannoplankton from the Central Pacific Ocean (DSDP Leg 33). Initial Reports of the Deep Sea Drilling Project. 33: 383-423. gs :: view :: open


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    Sphenolithus conspicuus compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 8-7-2020

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    Short stable page link: http://mikrotax.org/Nannotax3/index.php?id=1292 Go to Archive.is to create a permanent copy of this page - citation notes



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