Staurolithites ngurumahambaensis


Classification: Mesozoic -> Eiffellithales -> Chiastozygaceae -> Staurolithites -> Staurolithites ngurumahambaensis
Sister taxa: S. crux, S. dibrachiatus, S. stradneri, S. dentatus, S. eiffellithoides, S. flavus, S. halfanii, S. minutus, S. ngurumahambaensis, S. quadriarcullus, 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, > >>

Distinguishing features: Small (holotype 3 µm), unicyclic, transverse bar much brighter than longitudinal bar


Taxonomy:

Citation: Staurolithites ngurumahambaensis Lees, 2007
Rank: Species

Farinacci & Howe catalog pages: Staurolithites ngurumahambaensis *

Distinguishing features: Small (holotype 3 µm), unicyclic, transverse bar much brighter than longitudinal bar


Morphology remarks:

"A small species of Staurolithites with a dark, unicyclic rim, wherein the bars aligned with the long axis of the ellipse are dark, whilst the short-axis bars are highly birefringent. Differentiation: This new species is distinguished by its bright short-axis bars and dark long-axis bars." [Lees 2007]


Size: Holotype dimensions: L = 3.08μm, W = 2.2μm.

Search data:
TagsLITHS: murolith, elliptical, CA: cross-axial, process, V-UNITS: V-prominent, DETAILS: ca_disjunct, rim-unicyclic,
MetricsLith size: 2->4µm;
Sources: holotype +/-1µm
The morphological data given here can be used on the advanced search page. See also these notes

Geological Range:
Last occurrence (top): within Turonian Stage (89.77-93.90Ma, top in Turonian stage). Data source: Lees 2007 (original description)
First occurrence (base): within Cenomanian Stage (93.90-100.50Ma, base in Cenomanian stage). Data source: Lees 2007 (original description)

Plot of occurrence data:

  • (NB There is no histogram as there are no occurrence records for the taxon in the Neptune database) Parent: Staurolithites

    References:

    Lees, J. A. (2007). New and rarely reported calcareous nannofossils from the Late Cretaceous of coastal Tanzania: outcrop samples and Tanzania Drilling Project Sites 5, 9 and 15. Journal of Nannoplankton Research. 29(1): 39-65. gs


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    Staurolithites ngurumahambaensis compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 5-4-2020

    Taxon Search:
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    Short stable page link: http://mikrotax.org/Nannotax3/index.php?id=11136 Go to Archive.is to create a permanent copy of this page - citation notes



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