†family Xitidae Pessagno 1977 (radiolarian)
Parent taxon: Eucyrtidiacea according to P. De Wever et al. 2001
Sister taxa: Bekomidae, Eucyrtidiidae, Eucyrtiidae, Lophocyrtiidae, Obeliscoitidae, Pseudodictyomitridae, Theocotylidae
Subtaxa: Antexitus, Clavaxitus, Crolanium, Foremanina, Neorelumbra, Novixitus, Praexitus, Pseudodictyomitrella, Pseudoxitus, Xitus
Ecology: passively mobile planktonic omnivore