root › cellular organisms › Eukaryota › Opisthokonta › Metazoa › Eumetazoa › Bilateria › Protostomia › Ecdysozoa › Panarthropoda › Arthropoda › Chelicerata › Arachnida › Acari › Parasitiformes › Ixodida › Ixodoidea › Argasidae › Ornithodorinae