root › cellular organisms › Eukaryota › Opisthokonta › Metazoa › Eumetazoa › Bilateria › Protostomia › Ecdysozoa › Nematoda › Chromadorea › Rhabditida › Spirurina › Ascaridomorpha › Ascaridoidea › Anisakidae › Anisakis › Anisakis simplex complex › Anisakis simplex