Nannotax3 - ntax_mesozoic - Lithraphidites pugio

Lithraphidites pugio


Classification: ntax_mesozoic -> Nannoliths inc sedis -> Microrhabdulaceae -> Lithraphidites -> Lithraphidites pugio
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: Very large (13–24 μm long, 4.5-8 µm wide), dagger-shaped, outline convex 


Taxonomy:

Citation: Lithraphidites pugio Aguado, in Aguado et al. 2022
Rank: species

Farinacci & Howe catalog pages: L. pugio *

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: Very large (13–24 μm long, 4.5-8 µm wide), dagger-shaped, outline convex 


Morphology:

Lithraphidites pugio differs from L. magnus (emend.) by having a shorter (usually 4.5 μm) and nearly parallel sides (by around the half of its length) in side view, before tapering at the end. [Aguado et al. 2022]

Size:

Most likely ancestor: Lithraphidites aichmoides - at confidence level 3 (out of 5). Data source: Aguado et al. 2022 (Fig 11).
Likely descendants: Lithraphidites magnus; plot with descendants

Search data:
LITHS: nannolith-other, rod-shaped,
Lith size: 0->0µm;
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 Late Barremian Substage (70% up, 127.2Ma, in Barremian stage). Data source: Aguado et al. 2022, fig 11
First occurrence (base): in lower part of Late Barremian Substage (20% up, 128.8Ma, in Barremian stage). Data source: Aguado et al. 2022, fig 11

Plot of occurrence data:

References:

Aguado, R., Company, M., O'Dogherty, L., Sandoval, J. & Martinez, M. (2022). New insights into the Barremian–lower Aptian calcareous nannofossils of the Mediterranean Tethys: Chronostratigraphic and paleobiogeographic implications. Marine Micropaleontology. 173: 1-24. gs V O


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Lithraphidites pugio compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 7-10-2022

Taxon Search:
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Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=11406 Go to Archive.is to create a permanent copy of this page - citation notes



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