Nannotax3 - ntax_mesozoic - Lithraphidites quadratus

Lithraphidites quadratus


Classification: ntax_mesozoic -> Nannoliths inc sedis -> Microrhabdulaceae -> Lithraphidites -> Lithraphidites quadratus
Sister taxa: L. carniolensis ⟩⟨ L. charactozorro, L. grossopectinatus, L. kennethii, L. praequadratus, L. quadratus ⟩⟨ L. acutus, L. alatus, L. pseudoquadratus ⟩⟨ L. houghtonii, L. moray-firthensis ⟩⟨ L. aichmoides, L. magnus, L. pugio, L. bollii, L. sp.

Distinguishing features:
Parent taxon (Lithraphidites): Bladed, rod-shaped nannoliths typically tapering at both ends and with a cruciform cross-section and variably developed lateral projections; crystallographic c-axis perpendicular to length
This taxon: Lithraphidites with broad blades that taper sharply near each end. Each blade is broader than the central rod.


Taxonomy:

Citation: Lithraphidites quadratus Bramlette & Martini, 1964
Rank: Species

Farinacci & Howe catalog pages: L. quadratus + *

Distinguishing features:
Parent taxon (Lithraphidites): Bladed, rod-shaped nannoliths typically tapering at both ends and with a cruciform cross-section and variably developed lateral projections; crystallographic c-axis perpendicular to length
This taxon: Lithraphidites with broad blades that taper sharply near each end. Each blade is broader than the central rod.


Morphology:


Size:


Ecology & Biogeography


Biology & life-cycles

Phylogenetic relations

Search data:
LITHS: nannolith-other, rod-shaped, CA: process, CROSS-POLARS: T-prominent,
Lith size: 8->15µm; Segments: 4->4;
Data source notes: original description & illustrated specimens
The morphological data given here can be used on the advanced search page. See also these notes

Geological Range:
Last occurrence (top): at top of Maastrichtian Stage (100% up, 66Ma, in Danian stage). Data source: Lees & Bown 2005 - consistently present to end Cret
First occurrence (base): at base of UC20 zone (0% up, 69.2Ma, in Maastrichtian stage). Data source: Burnett 1998 (zonal marker)

Plot of occurrence data:

References:

Bramlette, M. N. & Martini, E. (1964). The great change in calcareous nannoplankton fossils between the Maestrichtian and Danian. Micropaleontology. 10(2): 291-322. gs

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

Cepek, P. (1978). Mesozoic calcareous nannoplankton of the Eastern North Atlantic, Leg 41. Initial Reports of the Deep Sea Drilling Project. 41: 667-687. gs V O

Hattner, J. G. & Wise, S. W. (1980). Upper Cretaceous calcareous nannofossil biostratigraphy of South Carolina. South Carolina Geology. 24: 41-117. gs

Lees, J. A. & Bown, P. R. (2005). Upper Cretaceous calcareous nannofossil biostratigraphy, ODP Leg 198 (Shatsky Rise, Northwest Pacific Ocean). Proceedings of the Ocean Drilling Program, Scientific Results. 198: 1-60. gs V O

Müller, C. (1974b). Calcareous nannoplankton, Leg 25 (Western Indian Ocean). Initial Reports of the Deep Sea Drilling Project. 25: 579-633. gs V O

Perez-Rodriguez, I., Lees, J. A., Larasoaña, J. C., Arz, J. A. & Arenillas, I. (2012). Planktonic foraminiferal and calcareous nannofossil biostratigraphy and magnetostratigraphy of the uppermost Campanian and Maastrichtian at Zumaia, northern Spain. Cretaceous Research. 37: 100-126. gs

Romein, A. J. T., Willems, H. & Mai, H. (1996). Calcareous nannoplankton of the Geulhemmerberg K/T boundary section, Maastrichtian type area, the Netherlands. Geologie en Mijnbouw. 75: 231-238. gs

Sissingh, W. (1977). Biostratigraphy of Cretaceous calcareous nannoplankton. Geologie en Mijnbouw. 65(1): 37-65. gs

Thibault, N. (2010). Calcareous nannofossils from the boreal Upper Campanian- Maastrichtian chalk of Denmark. Journal of Nannoplankton Research. 31(1): 39-56. gs V O


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Lithraphidites quadratus compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 3-12-2022

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Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=10591 Go to Archive.is to create a permanent copy of this page - citation notes



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