Small size species - CRANCHIIDAE / GONATIDAE

　Rostrum wide, rostral angle about 65°; Wing teeth triangular covered with shoulder--
Liocranchia reinhardti
　

　　　Rosturm narrow, rostral angle about 40°; Wing teeth semicircle, projected from wing shoulder---
Berryteuthis anonychus　
　

* Lower beaks smaller than 2mm with translucent wings and posterior margine of lateral wall are immature beaks of large sized species.
They can not be identified with this key.　　