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|Noun||1.||order Belemnoidea - order of extinct dibranchiate cephalopods related to the surviving spirulas|
animal order - the order of animals
Dibranchia, Dibranchiata, subclass Dibranchia, subclass Dibranchiata - comprising all living cephalopods except the family Nautilidae: the orders Octopoda (octopuses) and Decapoda (squids and cuttlefish)
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