Checklist for THECOSOMATA
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 NUDIBRANCHIA
Order NUDIPLEURA
Order SACOGLOSSA
Order THECOSOMATA
Unplaced Unplaced to Higher Taxon
Order UMBRACULIDA
Unplaced Unplaced to Order
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