[Bilateria] Hatschek, 1888 - bilaterians
see Subkingdom Bilateria Hatschek, 1888
ecdysozoans
see Clade Ecdysozoa Aguinaldo, Turbeville, Linford, Rivera, Garey, Raff & Lake 1997, nom. cl. inval.
Arthropoda Siebold, 1848 - arthropods
Arachnomorpha Heider, 1913
†Trilobitomorpha Størmer, 1944
see Superclass Trilobitomorpha Størmer, 1944
Subclass †Concilioterga nom. null.
see Subclass Conciliterga Hou & Bergström, 1997
Order †Helmetiida Novozhilov, 1969
Genus †Helmetia Walcott, 1918