Lithraphidites acutus subsp. acutus


Classification: Mesozoic -> Nannoliths inc sedis -> Microrhabdulaceae -> Lithraphidites -> Lithraphidites acutus -> Lithraphidites acutus subsp. acutus
Sister taxa: L. acutus subsp. acutus, L. acutus subsp. eccentricus,

Distinguishing features: Lithraphidites with four narrow, triangular processes projecting orthogonally from a position at or near the centre of the main rod.


Taxonomy:

Citation: Lithraphidites acutus subsp. acutus Verbeek & Manivit in Manivit et al., 1977
Rank: Sub-species

Farinacci & Howe catalog pages:

Distinguishing features: Lithraphidites with four narrow, triangular processes projecting orthogonally from a position at or near the centre of the main rod.


Morphology remarks: Lithraphidites acutus eccentricus and Lithraphidites acutus acutus may be palaeobiogeographic variants (Watkins in Watkins & Bowdler, 1984).

Geological Range:
Last occurrence (top): within UC4b subzone (94.39-94.44Ma, top in Cenomanian stage). Data source: copied from range of species
First occurrence (base): within UC3a subzone (95.93-96.16Ma, base in Cenomanian stage). Data source: copied from range of species

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: Lithraphidites acutus subsp. acutus, synonyms included - Lithraphidites acutum subsp. acutum; Lithraphidites acutus subsp. acutus; Lithraphidites acutum; Lithraphidites acutus; Lithraphidites acutus acutus;
  • space-time plot :: Samples map :: Parent: Lithraphidites acutus

    References:

    Bown, P. R. (2005c). Early to Mid-Cretaceous Calcareous Nannoplankton from the Northwest Pacific Ocean, Leg 198, Shatsky Rise. Proceedings of the Ocean Drilling Program. Scientific Results. 198: 1-82. gs

    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

    Watkins, D. K. & Bowdler, J. L. (1984). Cretaceous calcareous nannofossils from Deep Sea Drilling Project Leg 77, southeast Gulf of Mexico. Initial Reports of the Deep Sea Drilling Project. 77: 649-674. gs

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    Lithraphidites acutus subsp. acutus compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 16-10-2019

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