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  1. Colette Febvre-Chevalier,
  2. Jean Febvre

Published Online: 20 JUN 2001

DOI: 10.1038/npg.els.0001985



How to Cite

Febvre-Chevalier, C. and Febvre, J. 2001. Radiolaria. eLS. .

Author Information

  1. Oceanological Observatory, Villefranche-sur-Mer, France

Publication History

  1. Published Online: 20 JUN 2001

This is not the most recent version of the article. View current version (15 JAN 2016)


Radiolaria are marine unicellular microorganisms characterized by skeletons of silica and the presence of cytoplasmic processes radiating from the cell body. Both the fine structure and architectural diversity of the skeletons are used as taxonomic criteria. They have been joined with Acantharia in the phylum Radiozoa Cavalier-Smith, 1987. Radiolaria are used as stratigraphy markers.


  • Eukaryota;
  • Protozoa;
  • Actinopoda;
  • Radiozoa;
  • silica-based skeleton