Ridge Group :OCTOPOTEUTHIDAE

　　Small beak with LRL=5mm pigmented complately; narrow deep groove at jaw angle---Octopoteuthis sicula
　　　

　Medium beak with LRL=7mm pigmented incomplately; narrow wing tooth at jaw angle with catiragious wing fold---Octopteuthis deletron.
　　　

　Large beak with LRL=10mm pigmented nealy complately; wing round projected anteriorly; narrow wing tooth with low wing fold---Tanigia danae
　