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Keywords from Image Description:
Radiolaria Challenger Plate . follows Plate Astrolonchida Diam Fig Acanthometron bulbiferum sp Fig Acanthometron cylindricum sp Fig Lithophyllium gladiatum sp Fig Stauracantha quadrifurca sp Fig Stauracantha orthostaura sp Fig Phatnacantha icosaspis sp Fig Pristacantha polyodon sp Fig Pristacantha dodecodon sp