Lithostromation simplex

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


Citation: Lithostromation simplex (Klumpp, 1953) Bybell, 1975
Rank: Species
Basionym: Trochoaster simplex Klumpp, 1953
Synonyms: NB This appears to be a rather morphologically plastic group, so broad species concepts are probably appropriate

Distinguishing features: 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.

Farinacci & Howe catalog pages: Trochoaster simplex * , Polycladolithus stellaris * , Discoaster bramlettei * , Trochoaster duplex *

Morphology remarks: "This species has a hexagonal outline which thickens towards its center. The surface is pitted with circular perforations which are surrounded by knobby, hexagonal ridges. Each apex of the hexagon ends in a short ray. The planar hexagonal shape distinguishes L. simplex from other species in this genus." [Bybell 1975] "

See also: Imperiaster obscurus - forms with two triplets of rays in separate planes;

Search data:
TagsLITHS: nannolith-radiate, hexagonal------------, rosette-shaped, star-shaped, CA: pores,
CSPH: not known, V-UNITS: all, V-prominent, R-UNITS: none, DETAILS: 1ou,
MetricsLith size: 10->15µm; Segments: 6->6;
Sources: 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 Late Eocene Sub-Epoch (33.89-37.75Ma, top in Priabonian stage). Data source: Perch-Nielsen 1985
First occurrence (base): within Early Eocene Sub-Epoch (47.84-55.96Ma, base in Ypresian stage). Data source: Perch-Nielsen 1985

Plot of occurrence data:

  • Histogram - Neptune occurrence data from DSDP and ODP proceedings. Pale shading <50 samples in time bin. Interpret with caution & read these notes
  • Note to users in China - the diagram may not plot unless you use a VPN since I use google services on the website. If this is a problem please contact me 谢谢.
  • Taxon plotted: Lithostromation simplex, synonyms included - Lithostromation simplex; Trochoaster deflandrei; Trochoaster deflandrei deflandrei; Trochoaster deflandrei pseudoquadrupes; Trochoaster deflandrei subsp. deflandrei; Trochoaster deflandrei subsp. pseudoquadrupes; Trochoaster deflandrei subsp. torquatus; Trochoaster deflandrei torquatus; Trochoaster simplex; Trochoaster simplex simplex; Trochoaster simplex subsp. simplex; Trochoaster simplex subsp. variabilis; Trochoaster simplex variabilis;
  • space-time plot :: Samples map :: Parent: Lithostromation


    Bown, P. R. & Dunkley Jones, T. (2006). New Paleogene calcareous nannofossil taxa from coastal Tanzania: Tanzania Drilling Project Sites 11 to 14. Journal of Nannoplankton Research. 28(1): 17-34. gs

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

    Dunkley Jones, T., Bown, P. R. & Pearson, P. (2009). Exceptionally well preserved upper Eocene to lower Oligocene calcareous nannofossils (Prymnesiophycidae) from the Pande Formation (Kilwa Group), Tanzania. Journal of Systematic Palaeontology. 7(4): 359-411. gs

    Martini, E. & Stradner, H. (1960). Nannotetraster, eine stratigraphisch bedeutsame neue Discoasteridengattung. Erdoel-Zeitschrift. 76(8): 266-270. gs

    Martini, E. (1958). Discoasteriden und verwandte Formen im NW-deutschen Eozän (Coccolithophorida). 1. Taxonomische Untersuchungen. Senckenbergiana Lethaea. 39: 353-388. gs

    Martini, E. (1971a). Die Typen und Typoide des Natur-Museums Senckenberg, 46): Fossiles Nannoplankton. Senckenbergiana Lethaea. 52: 115-127. gs

    Perch-Nielsen, K. (1971b). Elektronenmikroskopische untersuchungen an Coccolithen und verwandten Formen aus dem Eozan von Danemark. Biologiske Skrifter. Kongelige Danske Videnskabernes Selskab. 18(3): 1-76. gs

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

    Stradner, H., Aubry, M. -P. & Bonnemaison, M. (2010). Calcareous nannofossil type specimens in the collection of the Geological Survey of Austria: A taxonomic and stratigraphic update. Jahrbuch der Geologischen Bundesanstalt. 150(1-2): 9-84. gs


    Lithostromation simplex compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 5-4-2020

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