Octopodiformes

＊This key does not include all Octopodiformes but may work for families.

　　Rostrum short with thick blunt tip; jaw edge and wing shoulder thick blunt・・・・OCTOPODIDAE
　

　Rostrum very short with serrated flat tip; jaw edge and wing shoulder serrated・・・・BOLITAEINIDAE
　Japetella diaphana

　Rosturm very small with pointed tip; hood very wide・・・・CHIRROTEUTHIDA
　Chirrothauma sp.

　Rostrum large triangular with chisel tip; lateral wall long narrow・・・・HALIPHRONIDAE)
　　
Haliphron atlanticus

　Rostrum large triangular with pointed tip; lateral wall short, hood-like・・・・STAUROTEUTHIDA
　　　
Stauroteuthis sp.