Checklist for OPISTHOBRANCHIA
Kingdom ANIMALIA
Animals
Phylum MOLLUSCA
Molluscs
Class GASTROPODA
Higher Taxon ORTHOGASTROPODA
Subclass HETEROBRANCHIA
Higher Taxon EUTHYNEURA
Superorder OPISTHOBRANCHIA
Order ACOCHLIDEA
Order APLYSIOMORPHA
Order CEPHALASPIDEA
Order CLADOBRANCHIA
Order GYMNOSOMATA
Order NUDIPLEURA
Order SACOGLOSSA
Order THECOSOMATA
Order UMBRACULIDA
Superorder PULMONATA
Slugs, Snails
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