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Keywords from Image Description:
Radiolaria Challenger Plate . follows Plate Coccodiscida Diam Fig Staurocyclia cruciata sp Fig Staurocyclia phacostaurus sp Fig Staurocyclia phacostaurus sp Vertical section through the centre Fig Staurocyclia magniducis sp Coccostaurus magniducis Fig Trigonocyclia triangularis sp Fig Stylocyclia prionacantha sp