1992 Drymosphaera (?) pseudosagenoscena - Sugiyama p.194; pI. 9, fig. 1a-4b
From Suzuki Paleotax db:
1992 Drymosphaera (?) pseudosagenoscena n. sp. Sugiyama p. 194, pl. 9, figs. 1a-4b
Catalog entries: Drymosphaera pseudosagenoscena
Original description: Central sphere single, small, latticed by cylindrical bars generally forming triclade, rarely diclade corners and polygonally shaped pores. The radial spines arising from the corners, generally more than 15 in number, very long, having three or four verticils disposed nearly at the same intervals, proximally cylindrical, distally becoming thick and changing into three-bladed beyond the first verticils. From each verticil arise cylindrical and straight bars, which are thinner than ones forming the central sphere and perpendicular to the radial spine. This type of radiation resulting in forming three or four lattice-plates with large, triangular meshes. Moreover, some bars developed obliquely from a verticil to preceding and following ones on neighboring spines. All bar is not hollow.
Geological Range:
Last occurrence (top): within Burdigalian Stage (15.97-20.44Ma, top in Burdigalian stage). Data source:
First occurrence (base): within Burdigalian Stage (15.97-20.44Ma, base in Burdigalian stage). Data source:
Plot of occurrence data:
Sugiyama, K. (1992d). New spumellarians (Radiolaria) from the Lower Miocene Toyohama Formation, Morozaki Group, central Japan. Bulletin of the Mizunami Fossil Museum. 19: 193-197. gsReferences:
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Drymosphaera pseudosagenoscena compiled by the radiolaria@mikrotax project team viewed: 21-6-2025
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