†Triactiscus Haeckel 1881 (radiolarian)
Parent taxon: Radiolaria according to I. Popova-Goll et al. 2005
Sister taxa: Amphicraspedum, Copiconica, Durahelenifore, Grosmorneus, Gyrosphaera, Labyrinthosphaera, Pentinastrum, Pheodaria, Polycystina, Rotasphaeracea, Spongosphaera, Stylotrochus, Veles
Subtaxa: Triactiscus triacuminatus
Ecology: passively mobile planktonic omnivore