From Suzuki Paleotax db:
1887 Plegmosphaera (Plegmosphaerusa) pachyplegma n. sp. Haeckel p. 89
1960 Plegmosphaera (Plegmosphaerusa) pachyplegma Haeckel Hollande & Enjumet p. 102, pl. 40, fig. 4
1980 Plegmosphaera pachyplegma Haeckel Boltovskoy & Riedel p. 106, pl. 1, fig. 17
1980 Plegmosphaera pachyplegma Haeckel Boltovskoy & Riedel p. 106, pl. 1, fig. 17
1981 Plegmosphaera pachyplegma Haeckel Takahashi & Honjo p. 146, pl. 1, fig. 14
1990 Plegmosphaera pachyplegma Haeckel Fujioka pl. 40, fig. 1
1991 Plegmosphaera pachyplegma Haeckel Takahashi p. 62
Catalog entries: Plegmosphaera pachyplegma
Original description: Radius of the spherical shell-cavity about equal to the thickness of the dark and dense spongy shell-wall. Inside and outside of the wall rough spongy, not closed by a lattice-plate. Meshes three to five times as broad as the bars.
Diameter of the shell 200µm, of its cavity 100µm.
Remarks on original description: Haeckel listed Plegmosphaera pachyplegma under the subgeneric name Plegmosphaerusa, but did not include the subgeneric name in the species name.
Geological Range:
Last occurrence (top): Extant. Data source: Lazarus et al. 2015 - "R age group"
First occurrence (base): within Quaternary Period (0.00-2.59Ma, base in Gelasian stage). Data source: Lazarus et al. 2015 - "R age group"
Plot of occurrence data:
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Plegmosphaera pachyplegma compiled by the radiolaria@mikrotax project team viewed: 10-10-2026
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