Genus:
Thordisa >
Family:
Discodorididae >
Superfamily:
Doridoidea >
Infraorder:
Doridoidei >
Suborder:
Doridina >
Order:
Nudibranchia >
Superorder:
Nudipleura >
Subterclass:
Ringipleura >
Infraclass:
Euthyneura >
Subclass:
Heterobranchia >
Class:
Gastropoda >
Phylum:
Mollusca >
Kingdom:
Animalia >
Unranked:
Biota >