See text Oegopsina is a suborder of the squid order, Teuthida, in the Cephalopod Class. Some taxonomists raise it to the level of an order, in which case it is known as Oegopsida.

• Suborder Oegopsina
  • Family Ancistrocheiridae
  • Family Architeuthidae
  • Family Bathyteuthidae
  • Family Batoteuthidae
  • Family Brachioteuthidae
  • Family Chiroteuthidae
  • Family Chtenopterygidae
  • Family Cranchiidae
  • Family Cycloteuthidae
  • Family Enoploteuthidae
  • Family Gonatidae
  • Family Histioteuthidae
  • Family Joubiniteuthidae
  • Family Lepidoteuthidae
  • Family Lycoteuthidae
  • Family Magnapinnidae
  • Family Mastigoteuthidae
  • Family Neoteuthidae
  • Family Octopoteuthidae
  • Family Ommastrephidae
  • Family Onychoteuthidae
  • Family Pholidoteuthidae
  • Family Promachoteuthidae
  • Family Psychroteuthidae
  • Family Pyroteuthidae
  • Family Thysanoteuthidae
  • Family Walvisteuthidae