Nannotax3 - Coccolithophores

Heliolithus

Classification: Coccolithophores -> Discoasterales -> Heliolithaceae -> Heliolithus
Sister taxa: Bomolithus, Heliolithus,

Daughter taxa: (blue => in age window 0-800Ma)
				Heliolithus aktasii Two relatively thick cycles of similar diameter.
				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.
				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.
				Heliolithus kleinpellii Large, heliolith with two thin birefringent cycles. The narrow cycle is around 3/4 of the width of the wider cycle.
				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.
				Heliolithus riedelii Heliolith with two high, birefringent cycles, the narrower cycle is around two thirds of the width of the broader.
				Heliolithus sp. Specimens which cannot be assigned to any established species

Taxonomy:

Citation: Heliolithus Bramlette and Sullivan, 1961

Rank: Genus

Type 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

Heliolithus compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 1-10-2020

Taxon Search:

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Short stable page link: http://mikrotax.org/Nannotax3/index.php?id=698 Go to Archive.is to create a permanent copy of this page - citation notes

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