Uneven Rostrum & Wide Angle Group - OMMASTREPHIDAE

　Wings pigmented at LRL =2 mm---Hyaloteuthis pelagica
　

*It resembles Watasenia scintillans beak. It can be distinguished from W. scintillans by nofold on lateral wall, shape of cutting edge, and shape of wing teeth.----Watasenia scintillans

　　　Wings and posterior margin of Lateral wall transparent--Large Size Ommastrephidae　
(T. pacificus, LRL=4.7mm)

*Beaks smaller than 2-3mm LRL, and having transparent wings in this group are not able to identify with this key.
Concerning to these small beaks, the other suitable key will be proposed.