Helicosphaera alata


Classification: Coccolithophores -> Zygodiscales -> Helicosphaeraceae -> Helicosphaera -> H. ampliaperta group -> Helicosphaera alata
Sister taxa: H. ampliaperta, H. scissura, H. magnifica, H. alata

Taxonomy:

Citation: Helicosphaera alatade Kaenel & Boesiger in Boesiger et al. 2017
Rank: species

Distinguishing features: Like H. magnifica but with open central area, and larger

Farinacci & Howe catalog pages:


Size: "large to very large" - probably 8-14 µm

Search data:
TagsLITHS:
MetricsLith size: 8->14µm;
Data source notes: Boesiger et al 2017
The morphological data given here can be used on the advanced search page. See also these notes

Geological Range:
Last occurrence (top): in lower part of NN4 zone (30% up, 17Ma, in Langhian stage). Data source: Boesiger et al 2017
First occurrence (base): in upper part of NN2 zone (70% up, 20.1Ma, in Aquitanian stage). Data source: Boesiger et al 2017

Plot of occurrence data:

References:

Boesiger, T. M., de Kaenel, E., Bergen, J. A., Browning, E. & Blair, S. A. , . (2017). Oligocene to Pleistocene taxonomy and stratigraphy of the genus Helicosphaera and other placolith taxa in the circum North Atlantic Basin. Journal of Nannoplankton Research. 37(2-3): 145-175. gs V O


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Helicosphaera alata compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 26-11-2020

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Short stable page link: http://mikrotax.org/Nannotax3/index.php?id=1630 Go to Archive.is to create a permanent copy of this page - citation notes



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