Micrantholithus mirabilis


Classification: Coccolithophores -> Braarudosphaerales -> Braarudosphaeraceae -> Micrantholithus -> Micrantholithus mirabilis
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 mirabilis Locker 1965
Rank: Species
Synonyms: Micrantholithus lateralis Sullivan (1965) [this appears to be a very similar taxon, and possibly it is a senior synonym (the precise publication dates need checking) - JRY 2016]

Distinguishing features: Micrantholithus with thickened central area and long extensions formed typically by single segments.

Farinacci & Howe catalog pages: Micrantholithus mirabilis * , Micrantholithus lateralis *


Morphology remarks: Translation of the original description: Pentaliths with segments that have a heart-shaped outline, without the long extensions. The segments are strongly thickened in the central part, so that the long projections lie in another optical plane. The extensions can be rotated significantly, in the extreme case so that all are twisted in the same direction to one side. Some segments may carry two extensions, others not . The suture lines appear to be more or less curved through the thickness of the central part.

Search data:
TagsLITHS: nannolith-radiate, star-shaped, RIM: free-rays-short, PROCESS: distal-star,
CSPH: not known, T-UNITS: all,
MetricsLith size: 12->30µm; Segments: 5->5; Liths per sphere: 12->12
Sources: lith size (diameter) from ODs & illustrated specimens; lith numbers assumed from geometry
The morphological data given here can be used on the advanced search page. See also these notes

See also: Pentaster lisbonensis - possibly the same taxon but better preserved.;

Geological Range:
Last occurrence (top): within Early Eocene Sub-Epoch (47.84-55.96Ma, top in Ypresian stage). Data source: original description
First occurrence (base): within Early Eocene Sub-Epoch (47.84-55.96Ma, base in Ypresian stage). Data source: original description

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 mirabilis, synonyms included - Micrantholithus mirabilis;
  • 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

    Chang, K. H. (1969). Several new species of middle and upper Eocene nannoplankton related with Micrantholithus parisiensis Bouché. Journal of the Geological Society of Korea. 5: 145-155. gs

    Locker, S. (1965). Coccolithophoriden aus Eozanschollen Mecklenburgs. Geologie Jg.. 14(10): 1252-1265. gs

    Perch-Nielsen, K. (1968b). Beobachtungen im elektronenmikroskop an Micrantholithus mirabilis und Marthasterites obscurus (Nannoplankton). Meddelelser fra Dansk Geologisk Forening. 18(2): 251-254. gs

    Perch-Nielsen, K. (1971b). Elektronenmikroskopische untersuchungen an Coccolithen und verwandten Formen aus dem Eozan von Danemark. Biologiske Skrifter. Kongelige Danske Videnskabernes Selskab. 18(3): 1-76. gs

    Shepherd, C. L. & Kulhanek, D. K. (2016). Eocene nannofossil biostratigraphy of the mid-Waipara River section, Canterbury Basin, New Zealand. Journal of Nannoplankton Research. 26(1): 33-59. gs

    Sullivan, F. R. (1965). Lower Tertiary nannoplankton from the California Coast Ranges. II. Eocene. University of California Publications in Geological Sciences. 53: 1-74. gs

    Varol, O. (1998). Palaeogene. In, Bown, P. R. (ed.) Calcareous Nannofossil Biostratigraphy. British Micropalaeontological Society Publication Series. 200-224. gs


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    Micrantholithus mirabilis compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 17-10-2019

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    Short stable page link: http://mikrotax.org/Nannotax3/index.php?id=869 Go to Archive.is to create a permanent copy of this page - citation notes



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