Subclass Radiolaria Müller, 1858
see Phylum Actinopoda Calkins, 1902
Order Polycystina Ehrenberg, 1838
see Class Polycystina Ehrenberg, 1838
Suborder Nassellaria Ehrenberg, 1875
see Class Nassellaria Ehrenberg, 1847
Family Pterocoryidae Haeckel, 1881
Genus Theocorythium Haeckel, 1887
Theocorythium trachelium (Ehrenberg, 1872)
Theocorythium trachelium dianae (Haeckel, 1887)