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