phaeogymnocellida phaeogymnocellida phaeogymnocellida is an order of cercozoans in the class phaeodarea. phaeogymnocellida scientific classification domain: eukaryota (unranked): sar (unranked): rhizaria phylum: cercozoa class: phaeodarea order: phaeogymnocellidaj. cachon & m. cachon, 1982 ex cachon & cachon, 1985 families atlanticellidae phaeodinidae phaeosphaeridae