Recent families from Parker, 1982

<==o Discomedusae [Scyphozoa Goette, 1887 in partim]
   |--o Rhizostomeae
   |  |-- Cassiopeidae
   |  |-- Catostylidae
   |  |-- Cepheidae
   |  |-- Lobonematidae
   |  |-- Lychnorhizidae
   |  |-- Mastigiidae
   |  |-- Rhizostomatidae
   |  |-- Stomolophidae
   |  |-- Thysanostomatidae
   |  `-- Versurigidae
   `--o Semaeostomeae Agassiz, 1862
      |-- Cyaneidae
      |-- Pelagiidae
      `-- Ulmariidae

Reference(s):