siphonosphaera siphonosphaera siphonosphaera is a genus of radiolarians. the genus contains bioluminescent species. it is a genus of colonial radiolarians (as opposed to solitary). siphonosphaera scientific classification domain: eukaryota clade: diaphoretickes clade: sar phylum: retaria class: polycystinea order: nassellaria family: collozoidae subfamily: collosphaeridae genus: siphonosphaeramuller 1858 species 5; see text species the following species are recognized: siphonosphaera hippotis siphonosphaera magnisphaera takahashi, 1991 siphonosphaera martensi brandt, 1905 siphonosphaera polysiphonia haeckel, 1887 siphonosphaera socialis haeckel, 1887