Classification
Biota [regio]Animalia [regnum]
Mollusca [phylum]
Cephalopoda [classis]
Classis Cephalopoda contains the following taxa:
Ammonitida [ordo]
Myopsida [ordo]
Nautilida [ordo]
Octopoda [ordo]
Oegopsida [ordo]
Sepiida [ordo]