A class of single-celled aquatic animals that are related to the radiolarians. They have a spherical shell with fine radiating needlelike projections.
- ‘Heliozoa have axopodia, long stiff projections of cytoplasm.’
- ‘However, due to the discovery of many new species, and discoveries regarding the morphology of the Heliozoa, the classic scheme is no longer deemed acceptable.’
- ‘Some groups found in vernal pools are Vorticella, Heliozoa, and Ameoba phylum.’
Modern Latin (plural), from Greek hēlios sun + zōion animal.