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Keywords from Image Description:
Radiolaria Challenger Plate . follows Plate Staurosphrida et Druppulida Diam Fig Cromyatractus tetracelyphus sp Fig The two inner medullary shells Fig Cromyatractus tetraphractus sp Fig Cromyatractus cepicius sp The spongy distal part of polar spine Fig Cromyatractus ceparius sp vel Caryostylus ceparius Fig Staurolonche