radiolaria - rads_cenozoic - Spirema circularis

Spirema circularis

Classification: rads_cenozoic -> Pyloniidae -> Spirema -> Spirema circularis
Sister taxa: S. circularis, S. melonia, S. sp.

Taxonomy

Citation: Spirema circularis Nakaseko in Nakaseko and Sugano 1973

Rank: species

Basionym: Spirema circularis

Taxonomic discussion: Nakaseko in Nakaseko & Sugano 1973, pl.1, fig.5 ; Unknown nomen nudum

Catalog entries: S. circularis [no catalog entry yet]

Description

Biogeography and Palaeobiology

Biostratigraphic distribution

Geological Range:
Last occurrence (top): within Neogene Period (2.59-23.03Ma, top in Piacenzian stage). Data source: Lazarus et al. 2015 - "N age group"
First occurrence (base): within Neogene Period (2.59-23.03Ma, base in Aquitanian stage). Data source: Lazarus et al. 2015 - "N age group"

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
(NB There is no histogram as there are no occurrence records for the taxon in the Neptune database) Parent: Spirema

References:

Nakaseko, K & Sugano, K. (1973). Neogene radiolarian zonation in Japan. Memoirs of the Geological Society of Japan. 8: 23-33. gs

Spirema circularis compiled by the radiolaria@mikrotax project team viewed: 17-1-2021

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Short stable page link: http://mikrotax.org/radiolaria/index.php?id=205444 Go to Archive.is to create a permanent copy of this page - citation notes

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