Lithoptychius varolii


Classification: ntax_cenozoic -> Discoasterales -> Fasciculithaceae -> Lithoptychius -> Lithoptychius varolii
Sister taxa: L. billii, L. janii, L. pileatus, L. ulii, L. varolii, L. vertebratoides, L. sp.

Taxonomy:

Citation: Lithoptychius varolii (Steurbaut and Sztràkos, 2007) Aubry in Aubry et al. 2011
Rank: Species
Basionym: Fasciculithus varolii Steurbaut and Sztràkos, 2007
Variants: These taxa are separated from each other and from L. varolii by minor details such as relative width of the three cycles.

Distinguishing features: Fasciculiths consisting of three distinct structures, including a proximal column, a middle cycle of lateral elements and a distal superimposed mushroom-shaped cone.

Farinacci & Howe catalog pages: F. varolii * , L. collaris * , L. felis * , L. schmitzii + *


Morphology: Both the lateral cycle and the dome are well distinguishable as two superimposed, optically different structures in cross-polarized light in side view.

Search data:
TagsLITHS: nannolith-radiate, circular, cylindrical, CROSS-POLARS: V-prominent, R-prominent,
MetricsLith size: 4.5->8.5µm;
Data source notes: size (width) from ODs
The morphological data given here can be used on the advanced search page. See also these notes

Geological Range:
Last occurrence (top): in upper part of NP4 zone (70% up, 62Ma, in Selandian stage). Data source: Monechi et al. 2013, Fig. 6
First occurrence (base): in upper part of NP4 zone (60% up, 62.2Ma, in Danian stage). Data source: Original description

Plot of occurrence data:

References:

Aubry, M. P., Bord, D. & Rodriguez, O. (2011). New taxa of the Order Discoasterales Hay 1977. Micropaleontology. 57(3): 269-287. gs

Bown, P. R. (2016). Paleocene calcareous nannofossils from Tanzania (TDP sites 19, 27 and 38). Journal of Nannoplankton Research. 36(1): 1-32. gs V O

Monechi, S., Reale, V., Bernaola, G. & Balestra, B. (2013). The Danian/Selandian boundary at Site 1262 (South Atlantic) and in the Tethyan region: Biomagnetostratigraphy, evolutionary trends in fasciculiths and environmental effects of the Latest Danian Event. Marine Micropaleontology. 98(1): 28-40. gs

Steurbaut, E. & Sztrákos, K. (2008). Danian/Selandian boundary criteria and North Sea Basin–Tethys correlations based on calcareous nannofossil and foraminiferal trends in SW France. Marine Micropaleontology. 67: 1-29. gs


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Lithoptychius varolii compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 8-3-2021

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Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=818 Go to Archive.is to create a permanent copy of this page - citation notes



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