Micrantholithus disculus


Classification: Coccolithophores -> Braarudosphaerales -> Braarudosphaeraceae -> Micrantholithus -> Micrantholithus disculus
Sister taxa: M. angulosus, M. astrum, M. attenuatus, M. bramlettei, M. breviradiatus, M. bulbosus, M. crenulatus, M. disculus, M. entaster, M. excelsus, M. flos, M. hebecuspis, M. minimus, M. mirabilis, M. pinguis, M. tinus, M. vesper, M. sp.,

Taxonomy:

Citation: Micrantholithus disculus (Bramlette & Riedel, 1954) Bown, 2005
Rank: Species
Basionym: Braarudosphaera discula Bramlette & Riedel, 1954
Synonyms: Citrocalculus minutus Troelsen & Quadros (1971) [specimens illustrated in side view by Bown 2005 clearly are the same as C. minutus - JRY April 2015]
Notes & discussion: Recombined as Micrantholithus discula by Bown 2005, the orthography was corrected to M. disculus by Bown 2016

Distinguishing features: Simple, elevated Micrantholithus with rounded outline and elliptical side views.

Farinacci & Howe catalog pages: Braarudosphaera discula * , Citrocalculus minutus *

Search data:
TagsLITHS: nannolith-radiate, spherical, pentagonal,
CSPH: not known, T-UNITS: all,
MetricsLith size: 6->9µm; Segments: 5->5; Liths per sphere: 12->12
Sources: lith size (diameter) from OD & illustrated specimens; lith numbers assumed from geometry
The morphological data given here can be used on the advanced search page. See also these notes

Geological Range:
Last occurrence (top): within Late Oligocene Sub-Epoch (23.03-28.09Ma, top in Chattian stage). Data source: Neptune records
First occurrence (base): within NP5 zone (59.54-61.51Ma, base in Selandian stage). Data source: [PRB rough estimate]

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: Micrantholithus disculus, synonyms included - Braarudosphaera discula; Micrantholithus discula;
  • space-time plot :: Samples map :: Parent: Micrantholithus

    References:

    Bown, P. R. (2005d). 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

    Bown, P. R. (2010). Calcareous nannofossils from the Paleocene/Eocene Thermal Maximum interval of southern Tanzania (TDP Site 14). Journal of Nannoplankton Research. 31: 11-38. gs

    Bown, P. R. (2016). Paleocene calcareous nannofossils from Tanzania (TDP sites 19, 27 and 38). Journal of Nannoplankton Research. 36(1): 1-32. gs

    Bramlette, M. N. & Riedel, W. R. (1954). Stratigraphic value of discoasters and some other microfossils related to Recent coccolithophores. Journal of Paleontology. 28: 385-403. gs

    Bramlette, M. N. & Sullivan, F. R. (1961). Coccolithophorids and related nannoplankton of the Early Tertiary in California. Micropaleontology. 7(129-188): -. gs

    Okada, H. & Thierstein, H. R. (1979). Calcareous nannoplankton - Leg 43, Deep Sea Drilling Project. Initial Reports of the Deep Sea Drilling Project. 43: 507-573. gs

    Troelsen, J. & Quadros, L. P. (1971). Distribuição bioestratigráfica dos nanofósseis em sedimentos marinhos (Aptiano-Mioceno) do Brasil. Anais da Academia Brasileira de Ciências. 43, 577-609: sulemento-. gs


    nannotaxlogo400px

    Micrantholithus disculus compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 5-12-2019

    Taxon Search:
    Advanced Search

    Short stable page link: http://mikrotax.org/Nannotax3/index.php?id=863 Go to Archive.is to create a permanent copy of this page - citation notes



    Comments (0)

    No comments yet. Be the first!

    Add Comment

    * Required information
    1000
    Captcha Image
    Powered by Commentics