Nannotax3 - ntax_mesozoic - Lithraphidites magnus

Lithraphidites magnus


Classification: ntax_mesozoic -> Nannoliths inc sedis -> Microrhabdulaceae -> Lithraphidites -> Lithraphidites magnus
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 (20-25 µm long, 4.5-7 µm wide), dagger-shaped with broad blades (~>5.7µm wide) that taper from their broadest point near one end.


Taxonomy:

Citation: Lithraphidites magnus (Covington & Wise, 1987) Aguado, in Aguado et al. 2022
Rank: species
Synonyms:

Farinacci & Howe catalog pages: L. alatus magnus + *

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 (20-25 µm long, 4.5-7 µm wide), dagger-shaped with broad blades (~>5.7µm wide) that taper from their broadest point near one end.


Morphology:

The holotype appears to be a broken specimen and the true nature of the liths is difficult to determine.

Size:


Ecology & Biogeography


Biology & life-cycles

Phylogenetic relations

Most likely ancestor: Lithraphidites pugio - at confidence level 3 (out of 5). Data source: Aguado et al. 2022 (Fig 11).

Search data:
LITHS: nannolith-other, rod-shaped, CA: process, CROSS-POLARS: T-prominent,
Lith size: 20->30µm; Segments: 4->4;
Data source notes: original description
The morphological data given here can be used on the advanced search page. See also these notes

Geological Range:
Notes: Aguado et al. 2022
Last occurrence (top): near base of Early Aptian Substage (10% up, 126Ma, in Aptian stage). Data source: Aguado et al. 2022, fig 11
First occurrence (base): in upper part of Late Barremian Substage (70% up, 127.2Ma, 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

Covington, J. M. & Wise, S. W. (1987). Calcareous nannofossil biostratigraphy of a Lower Cretaceous deep-sea fan complex: Deep Sea Drilling Project Leg 93 Site 603, lower continental rise off Cape Hatteras. Initial Reports of the Deep Sea Drilling Project. 93: 617-660. gs O

Roth, P. H. & Thierstein, H. R. (1972). Calcareous nannoplankton: Leg 14 of the Deep Sea Drilling Project. Initial Reports of the Deep Sea Drilling Project. 12: 546-559. gs O


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Lithraphidites magnus 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=10581 Go to Archive.is to create a permanent copy of this page - citation notes



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