Siphonosphaera is a genus of radiolarians. The genus contains bioluminescent species. It is a genus of colonial radiolarians (as opposed to solitary).
Species The following species are recognized: Siphonosphaera hippotis Siphonosphaera magnisphaera Takahashi, 1991 Siphonosphaera martensi Brandt, 1905 Siphonosphaera polysiphonia Haeckel, 1887 Siphonosphaera socialis Haeckel, 1887
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