Catalog entries: Plegmosphaera leptoplegma
Original description: Radius of the spherical shell-cavity half as great as the thickness of the loose spongy shell-wall. Inside and outside of the wall rough spongy, not closed by a lattice-plate. Meshes ten to twenty times as broad as the bars.
Diameter of the shell 300µm, of its cavity 88µm.
Remarks on original description: Haeckel listed Plegmosphaera leptoplegma under the subgeneric name Plegmosphaerusa, but did not include the subgeneric name in the species name.
Geological Range:
Last occurrence (top): Extant. Data source: Suzuki catalog
First occurrence (base): within Pleistocene Epoch (0.01-2.59Ma, base in Gelasian stage). Data source: Suzuki catalog
Plot of occurrence data:
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Plegmosphaera leptoplegma compiled by the radiolaria@mikrotax project team viewed: 10-10-2026
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