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Nannotax3 - ntax_cenozoic - Lithostromation reginum Nannotax3 - ntax_cenozoic - Lithostromation reginum

Lithostromation reginum


Classification: ntax_cenozoic -> Nannolith families inc sed -> Lithostromationaceae -> Lithostromation -> Lithostromation reginum
Sister taxa: L. hohnensis, L. pyramidale, T. tripartitus ⟩⟨ L. martinii, L. nodosum, L. obscurum, L. reginum ⟩⟨ L. operosum, L. perdurum, L. simplex, L. biconvexitas, L. sp.

Taxonomy:

Citation: Lithostromation reginum (Stradner 1962) Bybell 1975
Taxonomic rank: species
Basionym: Marthasterites reginus Stradner 1962
Taxonomic discussion: Possibly a synonym of Imperiaster obscurus

Distinguishing features:
Parent taxon (Lithostromation): Triangular to stellate nannoliths with porous structure formed from small crystallites. All show 3-fold symetry but with a wide range of forms.
This taxon: 6 long free rays at two levels, porous

Farinacci & Howe catalog pages: M. reginus *


Morphology:

"This species has six long, slender rays arranged in the same pattern as the playing pieces for the children's game of jacks. There are six knobs at the termination of each ray. The surface is covered with circular depressions which are surrounded by hexagonal, knobby ridges. The perforations become more shallow and more oval toward the ray ends. L. reginum is similar to  Marthasterites spineus Shafik and Stradner, which is distinguished by its lack of terminal nodes and the presence of small projections on either side of each ray." [Bybell 1975]

See also: Imperiaster obscurus ;

Search data:
LITHS: nannolith-radiate, star-shaped, CA: pores, CROSS-POLARS: V-prominent, 1ou,
Lith size: 0->0µm;
The morphological data given here can be used on the advanced search page. See also these notes

Geological Range:
Notes:  
Last occurrence (top): at top of Middle Eocene Sub-Epoch (100% up, 37.8Ma, in Bartonian stage). Data source: Bybell 1975
First occurrence (base): at top of Early Eocene Sub-Epoch (100% up, 47.8Ma, in Lutetian stage). Data source: Stradner 1962

Plot of occurrence data:

References:

Bybell, L. (1975). Middle Eocene calcareous nannofossils at Little Stave Creek, Alabama. Tulane Studies in Geology and Paleontology. 11(4): 177-247. gs O

Stradner, H. (1962). Über neue und wenig bekannte Nannofossilien aus Kreide und Alttertiär. Verhandlungen der Geologischen Bundesanstalt (Wien). 2: 363-377. gs


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Lithostromation reginum compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 19-4-2025

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Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=825 Go to Archive.is to create a permanent copy of this page - citation notes
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