Kingdom [Animalia] Linnaeus, 1758 - animals
   Ecdysozoa Aguinaldo, Turbeville, Linford, Rivera, Garey, Raff & Lake 1997, nom. cl. inval. - ecdysozoans see Clade Ecdysozoa Aguinaldo, Turbeville, Linford, Rivera, Garey, Raff & Lake 1997 [Lake, Halanych, Servin & Garey 2020]
     Panarthropoda Nielsen, 1995 - panarthropods
       Tritocerebra see [unranked] Tactopoda Budd, 2001
         Phylum Arthropoda Siebold, 1848 - arthropods
           1 Subphylum †Marellomorpha - lace crabs see Subphylum Marrellomorpha Beurlen, 1934
           2 Subphylum Arachnomorpha Heider, 1913 see [unranked] Arachnomorpha Heider, 1913
           3 Subphylum Mandibulata Snodgrass, 1938