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Ceratoikiscum sp.
genus Ceratoikiscum Deflandre, 1953
- Extinct species: Middle Ordovician - early Carboniferous (460.9 - 345.0 Ma)
- Habitat: Marine
- Classification
- kingdom Chromista, infrakingdom Rhizaria, phylum Radiozoa, class Polycystinea, order Albaillellaria, family Cratoikiscidae
- Distribution
- Ordovician: Gifu
- Silurian: Gifu