the root (no rank)
Eukaryota (domain)
Metazoa (kingdom)
Mollusca (phylum)
Gastropoda (class)
Opisthobranchia (subclass)
[hide inferior taxa]
Anaspidea (order)
Cephalaspidea (order)
Glaucidae (family)
Placobranchidae (family)
Tritonia diomedia (species)