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Genus Pholas
- type genus of the family Pholadidae: piddocks
Genus Nautilus
- type genus and sole recent representative of the family Nautilidae
Genus Octopus
- type genus of the family Octopodidae
Genus Argonauta
- type genus of the family Argonautidae: paper nautilus
Genus Sepia
- type genus of the Sepiidae
Genus Spirula
- genus of small cephalopods with many-chambered spiral shells resembling those of the extinct belemnites