Staurolithites aenigma


Classification: Mesozoic -> Eiffellithales -> Chiastozygaceae -> Staurolithites -> Staurolithites aenigma
Sister taxa: << < S. siesseri, S. coroniformis, S. gausorhethium, S. leptostaurus, S. dorfii, S. handleyi, S. imbricatus, S. laffittei, S. lumina, S. mielnicensis, S. mitcheneri, S. angustus, S. mutterlosei, S. zoensis, S. aachenus, S. aenigma, S. dicandidula, S. ellipticus, S. elongatus, S. integer, S. parma, S. sp.,

Distinguishing features: Rim bicyclic central area with plate around the cross


Taxonomy:

Citation: Staurolithites aenigma Burnett, 1997
Rank: Species
Notes & discussion: The species is tentatively placed in Staurolithites but is dissimilar to other species in this genus because of the unusual situation of the cross sitting in a central plate. It is easily distinguishable from other species of the genus because of this feature. [Burnett 1997]

Farinacci & Howe catalog pages: Staurolithites aenigma *

Distinguishing features: Rim bicyclic central area with plate around the cross


Morphology remarks: Small- to medium-sized, elliptical coccolith with a bicyclic rim. The rims are equally narrow, the outer one being dark and the inner one bright. The central area contains a plate: this is unclear from LM observation but has been observed in the SEM. The axial cross is com-posed of laths and sits partially within the plate. This cross tends to be highly birefringent in the LM. [Burnett 1997]

Search data:
TagsLITHS: murolith, elliptical, CA: cross-axial, plate, process, V-UNITS: V-prominent, R-UNITS: R-prominent, DETAILS: ca_disjunct, rim-bicyclic,
MetricsLith size: 4->6µm;
Sources: illustrated specimens
The morphological data given here can be used on the advanced search page. See also these notes

Geological Range:
Last occurrence (top): within Early Cenomanian Substage (96.24-100.50Ma, top in Cenomanian stage). Data source: Burnett 1998
First occurrence (base): within Late Albian Substage (100.50-107.59Ma, base in Albian stage). Data source: Burnett 1998

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: Staurolithites aenigma, synonyms included - Staurolithites aenigma;
  • space-time plot :: Samples map :: Parent: Staurolithites

    References:

    Burnett, J. A. (1997). New species and new combinations of Cretaceous nannofossils and a note on the origin of Petrarhabdus (Deflandre) Wise & Wind. Journal of Nannoplankton Research. 19(2): 133-146. gs :: view :: open

    Burnett, J. A. (1998). Upper Cretaceous. In, Bown, P. R. (ed.) Calcareous Nannofossil Biostratigraphy. British Micropalaeontological Society Publication Series. 132-199. gs :: ::

    Gale, A. S., Kennedy, W. J., Burnett, J. A., Caron, M. & Kidd, B. E. (1996). The Late Albian to Early Cenomanian succession at Mont Risou, near Rosans (Drôme, SE France): an integrated study (ammonites, inoceramids, planktonic foraminifera, nannofossils, oxygen and carbon isotopes). Cretaceous Research. 17: 515-606. gs :: ::


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    Staurolithites aenigma compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 16-7-2020

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    Short stable page link: http://mikrotax.org/Nannotax3/index.php?id=11111 Go to Archive.is to create a permanent copy of this page - citation notes



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