Stylosphaera hexaxyphophora


Classification: rads_cenozoic -> Actinommidae -> Stylosphaeridae -> Stylosphaera -> Stylosphaera hexaxyphophora
Sister taxa: Stylosphaera coronata, S. dixyphos, S. hexaxyphophora, S. hispida, S. laevis, S. macrosphaera, S. minor, S. radiosa, S. sp.

Taxonomy

Citation: Stylosphaera hexaxyphophora Clark & Campbell 1942
Rank: species
Basionym: Lithelius hexaxyphophora

Catalog entries: Stylosphaera hexaxyphophora

Original description: Shell having five to eight elongated, similar, generally conical polar spines all in the same plane; globular cortical shell thick-walled, its surface with seven circular to oval pores across radius, these pores sunken into hexagonal areas from whose nodal angles extend short sepaloid points, but the whole surface is not pronouncedly burrlike as in some other species; medullary shell about 0.3 diameter of cortical shell, dense, with three to five irregular pores across a radius, and with strong supporting beams connecting to the outer shell. Distinguishing characters (rw): Stylosphaera hexaxyphophora n. sp. is related to S. trixyphophora n. sp. but has six instead of three spines – much heavier on the latter than on the former – and much shorter and finer surface spinules.
Remarks on original description: [The authors here list this species under the subgeneric name Stylosphaerella and include the subgeneric name in the species name.

Description

Biogeography and Palaeobiology

Biostratigraphic distribution

Geological Range:
Last occurrence (top): within Paleogene Period (23.03-66.04Ma, top in Chattian stage). Data source: Lazarus et al. 2015 - "P age group"
First occurrence (base): within Paleogene Period (23.03-66.04Ma, base in Danian stage). Data source: Lazarus et al. 2015 - "P age group"

Plot of occurrence data:

References:


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Stylosphaera hexaxyphophora compiled by the radiolaria@mikrotax project team viewed: 22-10-2020

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Short stable page link: http://mikrotax.org/radiolaria/index.php?id=205686 Go to Archive.is to create a permanent copy of this page - citation notes



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