Quadrum gartneri


Classification: Mesozoic -> Braarudosphaerales -> Polycyclolithaceae -> Quadrum -> Quadrum gartneri
Sister taxa: Q. gartneri, Q. svabenickae, Q. bengalensis, Q. intermedium, Q. eptabrachium, Q. octobrachium, Q. eneabrachium, Q. giganteum, Q. sp.,

Distinguishing features: Cubiform Quadrum with four wall-cycle elements.


Taxonomy:

Citation: Quadrum gartneri Prins & Perch-Nielsen in Manivit et al., 1977
Rank: Species

Farinacci & Howe catalog pages: Quadrum gartneri * , ,

Distinguishing features: Cubiform Quadrum with four wall-cycle elements.


Morphology remarks: Readily distinguished from Micula both by simpler morphology and by showing the opposite crystalographic orientation (c-axes tangential rather than radial).

See also: Uniplanarius gothicus - very similar, possibly a synonym;

Geological Range:
Notes: In some areas FO is higher, in UC11a (Burnett 1998)
Last occurrence (top): within Maastrichtian Stage (66.04-72.05Ma, top in Maastrichtian stage). Data source: Burnett 1998
First occurrence (base): at base of UC7 zone (0% up, 93.6Ma, in Turonian stage). Data source: Burnett 1998 (zonal marker), fig.6.3

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: Quadrum gartneri, synonyms included - Quadrum gartneri; Tetralithus pyramidus; space-time plot :: Samples map :: Parent: Quadrum

    References:

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

    Manivit, H., Perch-Nielsen, K., Prins, B. & Verbeek, J. W. (1977). Mid Cretaceous calcareous nannofossil biostratigraphy. Proceedings of the Koninklijke Nederlandse Akademie van Wetenschappen. B80(3): 169-181. gs


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    Quadrum gartneri compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 20-7-2019

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    Short stable page link: http://mikrotax.org/Nannotax3/index.php?id=10970 Go to Archive.is to create a permanent copy of this page - citation notes



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