Cytocystididae

Nephrozoa Jondelius, Ruiz-Trillo, Baguna, & Riutort, 2002

Platyhelminthes Minot, 1876

Rhabditophora Ehlers, 1985

Trepaxonemata Ehlers, 1984

Euneoophora Laumer & Giribet, 2014

Rhabdocoela Ehrenberg, 1831

Kalyptorhynchia Graff, 1905

Eukalyptorhynchia Meixner, 1928

Cytocystididae Karling, 1964