Answer:
A) shell
B) Belemnotheutis
Step-by-step explanation:
The Belemnotheutis is an extinct coleoid cephalopod genus from the middle and upper Jurassic. It has an inner shell made up of a conical phragmocone apically surrounded by a thin rostrum or guard, which is similar in structure and evolutionary origin to true belemnites' bullet-shaped rostrum, a small forward projected proostracum, and ten arms of similar length hooks.
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