kingdom: Animalia >
phylum: Mollusca >
class: Gastropoda Cuvier, 1795 >
subclass: Heterobranchia Burmeister, 1837 >
infraclass: Euthyneura Spengel, 1881 >
subterclass: Ringipleura >
superorder: Nudipleura Wägele & Willan, 2000 >
order: Nudibranchia Cuvier, 1817 >
suborder: Doridina >
infraorder: Doridoidei >
superfamily: Doridoidea Rafinesque, 1815 >
family: Discodorididae Bergh, 1891 >
genus: Thordisa Bergh, 1877 >