TEUTHOIDEA

* This key includes 42 common species of squids found in the Northwest Pacific (see Data Sheets). This key may work for identification of lower beaks of those species in a certain size range. But please keep in mind that this key does not include all species known from this region nor does it cover all size ranges of beaks.

　　Strong ridge which can be picked up with tweezers runs obliquely on lateral wall・・・・・・Ridge Group
　　

　Clear fold runs obliquely on lateral wall・・・・・・・・Fold Group
　

　No fold or weak darkning on lateral wall・・Flat Group
　

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