rhaphidozoum rhaphidozoum rhaphidozoum is a radiolarian genus reported in the subfamily sphaerozoidae. the genus contains bioluminescent species. it is a genus of colonial radiolarians (as opposed to solitary). rhaphidozoum scientific classification domain: eukaryota clade: diaphoretickes clade: sar phylum: retaria class: polycystinea order: nassellaria family: collozoidae subfamily: sphaerozoidae genus: rhaphidozoum species 1; see text species the following species are recognized: rhaphidozoum pandora haeckel, 1887