Heliolithus
Classification: ntax_cenozoic -> Discoasterales -> Heliolithaceae -> Heliolithus
Sister taxa: Bomolithus, Heliolithus
Daughter taxa (time control age-window is: 0-800Ma) |
| | | | Heliolithus aktasii
Two relatively thick cycles of similar diameter.
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| | | | Heliolithus bukryi
Heliolith with two birefringent cycles: a broad, thin cycle and a thin, much narrower cycle, around 1/3 of the width of the wider cycle.
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 |  |  |  | Heliolithus cantabriae
Heliolith with a broad, thin cycle and a taller, narrower cycle. The narrower cycle is over 3/4 of the width of the wider cycle.
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 |  |  |  | Heliolithus kleinpellii
Large, heliolith with two thin birefringent cycles. The narrow cycle is around 3/4 of the width of the wider cycle.
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| | | | Heliolithus knoxii
Heliolith with two birefringent cycles: a broad, thin cycle and a tall, narrower cycle, around half of the width of the wider cycle.
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 |  |  |  | Heliolithus riedelii
Heliolith with two high, birefringent cycles, the narrower cycle is around two thirds of the width of the broader.
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 |  |  |  | Heliolithus sp.
Specimens which cannot be assigned to any established species
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Taxonomy:
Citation: Heliolithus Bramlette and Sullivan, 1961Rank: GenusType species: Heliolithus riedelii Bramlette & Sullivan, 1961
Distinguishing features: Discoidal discoasteralids with birefringent appearance.
Farinacci & Howe catalog pages: Heliolithus *
Search data:
| Tags | LITHS: nannolith-radiate, circular, star-shaped, CROSS-POLARS: V-prominent, R-prominent, |
| Metrics | Lith size: 6->18µm; |
The morphological data given here can be used on the advanced search page. See also these notes
Geological Range:
Last occurrence (top): in upper part of Thanetian Stage (70% up, 56.9Ma, in Thanetian stage). Data source: Total of range of species in this database
First occurrence (base): at base of Selandian Stage (4% up, 61.5Ma, in Selandian stage). Data source: Total of range of species in this database
Plot of occurrence data:
- Range-bar - range as quoted above, pink interval top occurs in, green interval base occurs in.
- Triangles indicate an event for which a precise placement has been suggested
- Neptune data: This is a higher taxon page so Neptune data is not plotted. See also: customisable plot Parent: Heliolithaceae
References:
Bramlette, M. N. & Sullivan, F. R. (1961). Coccolithophorids and related nannoplankton of the Early Tertiary in California. Micropaleontology. 7(2): 129-188. 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
