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).

Search data:
Tagsnannolith-other, rod-shaped, CA: process,
MetricsLith size: 8->15µm; Segments: 4->4;
Data source notes: illustrated specimens
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 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:

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 V O

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

Corbett, M. J. & Watkins, D. K. (2014). Cenomanian through basal Coniacian Calcareous Nannofossil biostratigraphy of the Mancos Shale reference section, Mesa Verde National Park, CO. Stratigraphy. 11(1): 97-108. 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 V O


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Lithraphidites acutus subsp. acutus compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 25-9-2020

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