Lithostromation operosum


Classification: Coccolithophores -> Nannolith families inc sed -> Lithostromationaceae -> Lithostromation -> Lithostromation operosum
Sister taxa: L. biconvexitas, L. operosum, L. perdurum, L. reginum, L. simplex, L. sp., T. martinii,

Taxonomy:

Citation: Lithostromation operosum (Deflandre, 1954) Bybell 1975
Rank: Species
Basionym: Polycladolithus operosus Deflandre in Deflandre & Fert, 1954
Synonyms:

Distinguishing features: Medium-sized (5-10 µm), sub-circular

Farinacci & Howe catalog pages: P. operosus * , T. conglobatus *


Morphology remarks:

"This species has a spherical body with an irregular, knobby surface and numerous circular depressions. Each depression is surrounded by a hexagonal ridge with a knob at each corner of the hexagon. Some specimens have six large projections evenly spaced around the equator of the sphere. There are no discernible crystal elements and L. operosum is dark under cross-polarized light." [c]

Search data:
TagsLITHS: nannolith-radiate, star-shaped, CA: pores, CROSS-POLARS: 1ou, V-prominent,
MetricsLith size: 5->10µm; Segments: 6->6;
Data source notes: lith size from ODs & 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 Oligocene Epoch (23.03-33.89Ma, top in Chattian stage). Data source: [JRY rough estimate]
First occurrence (base): within Eocene Epoch (33.89-55.96Ma, base in Ypresian stage). Data source: [JRY rough estimate]

Plot of occurrence data:

References:

Bramlette, M. N. & Sullivan, F. R. (1961). Coccolithophorids and related nannoplankton of the Early Tertiary in California. Micropaleontology. 7(2): 129-188. gs

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

de Kaenel, E. & Villa, G. (1996). Oligocene-Miocene calcareous nannofossil biostratigraphy and paleoeecology from the Iberian Abyssal Plain. Proceedings of the Ocean Drilling Program, Scientific Results. 149: 79-145. gs V O

Deflandre, G. & Fert, C. (1954). Observations sur les coccolithophoridés actuels et fossiles en microscopie ordinaire et électronique. Annales de Paléontologie. 40: 115-176. gs

Self-Trail, J. (2011). Paleogene Calcareous Nannofossils of the South Dover Bridge core, Southern Maryland (USA). Journal of Nannoplankton Research. 32(1): 1-28. gs V O

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


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Lithostromation operosum compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 29-9-2020

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Short stable page link: http://mikrotax.org/Nannotax3/index.php?id=823 Go to Archive.is to create a permanent copy of this page - citation notes



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