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Keywords from Image Description:
Radiolaria Challenger Plate . follows Plate Anthocyrtida Podocyrtida Phormocyrtida et Theocyrtida Diam Fig Theophormis callipilium sp Fig Theophormis callipilium sp The four cruciate rods of the cortinar septum and the vertical columella in its centre Fig Theophormis callipilium sp The cephalis alone with the enclosed