Nannotax3 - ntax_cenozoic - Lithostromation Nannotax3 - ntax_cenozoic - Lithostromation

Lithostromation


Classification: ntax_cenozoic -> Nannolith families inc sed -> Lithostromationaceae -> Lithostromation
Sister taxa: Lithostromation, Planolithus, Imperiaster, Martiniaster, Isolithus

Daughter taxa (time control age-window is: 0-800Ma)
Lithostromation biconvexitas
Ellipsoidal central body with ends extended as spines
Lithostromation martinii
Hexradiate with distinct free rays, all 6 rays similar,  ridge runs along length of rays
Lithostromation nodosum

Lithostromation obscurum

Lithostromation operosum
Medium-sized (5-10 µm), sub-circular
Lithostromation perdurum
Large, triangular nannoliths with porous structure formed from small crystallites.
Lithostromation reginum
6 long free rays at two levels
Lithostromation simplex
Hexagonal, perforate nannolith with low birefringence. Six thin rays extend a short distance beyond the margin of hexagonal disc with numerous pores. Secondary shorter rays are present between each of the longer rays, which terminate at the disc edge.
Lithostromation sp.

Lithostromation hohnensis

Lithostromation pyramidale

Taxonomy:

Citation: Lithostromation Deflandre, 1942
taxonomic rank: Genus
Type species: Lithostromation perdurum Deflandre, 1942
Synonyms:

Distinguishing features:
Parent taxon (Lithostromationaceae): Large (10-20µm) triangular to stellate nannoliths with porous structure formed from small crystallites. In xpl behave as single crystal unit with low birefringence
This taxon: Triangular to stellate nannoliths with porous structure formed from small crystallites.

Farinacci & Howe catalog pages: Lithostromation * , Trochoaster * , Polycladolithus * , Trochastrites * , Imperiaster *


Size:
Most illustrated specimens and described species are 10-15 µm across, except for L. operosum which is  smaller, 5-10 µm


Ecology & Biogeography

Typically confined to epicontinental areas.

Search data:
LITHS: nannolith-radiate, star-shaped, CA: pores, CROSS-POLARS: 1ou, V-prominent,
Lith size: 5->15µm;
The morphological data given here can be used on the advanced search page. See also these notes

Geological Range:
Last occurrence (top): at top of NN19 zone (100% up, 0.4Ma, in Ionian stage). Data source: Total of ranges of the species in this database
First occurrence (base): within Early Eocene Sub-Epoch (47.84-55.96Ma, base in Ypresian stage). Data source: Total of ranges of species in this database

Plot of occurrence data:

References:

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

Deflandre, G. (1942b). Possibilitès morphogénétiques comparées du calcaire et de la silice, à propos d'un nouveau type de microfossile calcaire de structure complexe, Lithostromation perdurum n. g. n. sp. Comptes rendus hebdomaire de l'Académie des sciences, Paris. 214: 917-920. gs

Deflandre, G. (1959). Sur les nannofossiles calcaires et leur systématique. Revue de Micropaléontologie. 2: 127-152. gs

Klumpp, B. (1953). Beitrag zur Kenntnis der Mikrofossilien des Mittleren und Oberen Eozän. Palaeontographica Abteilung A Palaeozoologie Stratigraphie. 103: 377-406. gs

Martini, E. (1970). Imperiaster n. g. aus dem europäischen Unter-Eozän (Nannoplankton, incertae sedis). Senckenbergiana Lethaea. 51: 383-386. gs

Perch-Nielsen, K. (1985). Cenozoic calcareous nannofossils. In, Bolli, H. M., Saunders, J. B. & Perch-Nielsen, K. (eds) Plankton Stratigraphy. Cambridge University Press, Cambridge 427-555. gs


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Lithostromation compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 21-4-2024

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Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=820 Go to Archive.is to create a permanent copy of this page - citation notes
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Comments (2)

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Vladimir Musatov(Russia)

Hello Jeremy.

In the article "The fossil record of coastal coccolithophores" - 2019, you posted a photo of Lithostromation stellaris. But I did not find a description of this species. I also met similar specimens in the Eocene, I could not identify them. It looks like Lithostromation simplex or Trochoaster martinii, but they are certainly not. Do you have a description of this species and its stratigraphic distribution. Why is this species not in Nanotax3 ?

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Jeremy Young(UK)

Hi Vladimir

Polycladolithus stellaris was described by Stradner 1959 and reillustrated by Stradner et al 2010, it is generally regarded as a junior synonym of L. simplex. I am not sure if the combination Lithostromation stellaris has been formally proposed - Paul Bown wrote the relevant part of the paper on shallow marine nannos. I will ask him.

Jeremy