collosphaera collosphaera collosphaera is a radiolarian genus in the family collosphaeridae. the genus contains bioluminescent species. it is a genus of colonial radiolarians (as opposed to solitary). collosphaera illustration of collosphaera huxleyi scientific classification domain: eukaryota clade: diaphoretickes clade: sar phylum: retaria class: polycystinea order: nassellaria family: collozoidae subfamily: collosphaeridae genus: collosphaeramüller 1859 species 6; see text species the following species are recognized: collosphaera armata brandt collosphaera confossa takahashi, 1991 collosphaera huxleyi mueller, 1855 collosphaera macropora popofsky, 1917 collosphaera polygona haeckel, 1887 collosphaera tuberosa haeckel, 1887